Exactly, I think the roleplay police is already among us. While you and others believe they are 100% libertarian, they are in turn forcing their views upon others.

I for instant have no problem with guidelines on some matters. If is for the greater good, we better follow the same rules. It shouldn't be too enforcing, rules are meant to restrict abuse not creativity. Neither should be they be static, they are not unquestionable and should be revised with the changing environment.

Please stop projecting onto others. Personally, I've roleplayed with just about every single custom whatever and OP thing anyone could possibly come up with. I can't be bothered to be mad about that kinda shit. We all follow the same rules, some of us are just too mellow to argue about shit like that because we just can't bring ourselves to care. The rules, in my opinion, do not restrict creativity in the least. There is lore-breaking and there is lore-bending and lore-bending is already widely accepted among the community.

I'm minimalizing it as a non-issue because I genuinely don't believe it's an issue. I would explain why I don't believe it's an issue, but I already have and I would just be repeating myself.

In a community that exists completely by the voluntary participation of every individual present (and therefore would not exist at all if those individuals didn't continue to volunteer their time), there is practically no such thing as "too much decided by the individual," even if that decision is "agree with the majority or don't agree with the majority." There's no such thing because, if those individuals didn't get to decide for themselves and they didn't like what they had to do, they would no longer participate at all and the community would no longer exist (or would be substantially smaller). I, for example, would never roleplay in the RSRP community again if I somehow no longer had the option to decline to play with characters who do nothing but piss me off and ruin my mood because they're so obnoxious to include.

We are not children, we are responsible for forming our own opinions and choices about what we do and don't want to do. Not only that, you can't stop us from forming our own opinions and making our own choices instead of yours - trying to force it will be an exercise in futility and only annoy people.

This is what you can do: see a problem, craft a thoughtful solution to the problem, present it to the community, hope it's recieved. That's it.

• If it's something other people agree is a problem and your proposed solution is viable from all or most perspectives, odds are the community will adopt it. (Example: For a while, there was a lot of frustration in rp about people autoing invasions of cities and saying "well we came to fight but there was nobody here so guess we won, noobs." It was absurd, that they thought they could walk in with 3 knights and conquer an entire city that was supposedly guarded by an entire army. Then someone proposed that anyone wishing to battle or invade a major body had to schedule it ahead of time so that people who would realistically be present could plan to be around, and now it's common practice.) 
• If you present a viable solution but the majority does not agree that there's a problem to start with, it probably will not be adopted because people won't have any reason to support the change. (Example: At least once, I saw someone make a thread trying to propose a way that vampyres could escape Morytania because he thought their geographic limitations were unfair. His solution was brushed off because people generally don't think that vampyre limitation is a bad thing.)
• If the issue you've observed is problematic for others but the solution is not viable from most perspectives, it probably won't be universally adopted. (Example: Tibby System was proposed as a solution to the value-of-rp-money issue, but only partially adopted because large chunk of the community did not consider it a viable solution.)

So far, it seems like you've identified a potential problem and haven't proposed much in the way of a solution (because you're asking others for solution ideas), but it seems that you're not getting any suggestions because others don't agree that your problem is actually a problem. 

Just gonna interject, I disagree with this observation. A vampyre will almost always be more powerful compared to a human, but the words powerful and overpowered don't mean the same things. Powerful just means powerful whereas overpowered means powerful to the point that it's destructive to to the roleplaying experience. I think most morytania rpers wouldn't say that the physical advantages of vampyres destroy their ability to happily rp in mory.

In fact, the physical advantages of vampyres do not even need to destroy their ability to interact with other species within Morytania. It is, again, a question of looking at the situation and asking yourself what you can bring to the situation, and whether it will be a positive experience for (preferably all) most of the people involved.

EDIT: For the record, this does not exclude antagonism. It merely asks that the would-be antagonist considers his entry beforehand and, if needed, asks the roleplayers if they would be okay with the antagonism.

People give vyres crap for being vyres, in vyre-land, doing vyre things.

Also, at the end of the day, I'd rather deal with 10 overpowered crazy people rather than one person trying to be the RP police. 

Oi, mate. Can't rp bee-bears west of honeycomb forest.

Show me your fkin badge

I agree with this. A powerful character is a character that is reasonably powerful in their setting, much like how vampyres still have power in Morytania because they're powerful entities. Most of my powerful characters had to work up in-character to get where they are currently, which is a preferable way to get a powerful character, but as a rule I give them limits to their power. Overpowering would be saying something like your vampyre character killed Veliaf, that he's immune to blisterwood because necromancy=P, or that he was good enough at dark magic to wipe Darkmeyer out of existence, and all of this being done with a brand new character. To sum up, overpowering is powering up a character to the point where everyone can unanimously say, "That's just rediculous."