And it's like 12vs 12 pvp? :o
Yes. The server has seen better days. It has also seen worse.
Part of the problem isn't population, it's the opposite faction feeling like they're not adequate enough to even attempt a skirmish. Something something "gear gap", although I'm not sure how that's possible at this point. We were able to manage this League vs. League match because it was a time where NA and EU times overlapped briefly.
The population on P2P is growing (slowly but steadily). I encourage you to take advantage of the free month being offered now if you're interested in subscription server. You'll see people from F2P pissing in our cornflakes because they're mad that we're not playing as their one-shot pawns anymore. While I can't tell you that you'll personally have more fun on our server or on F2P, I can tell you that my experience has been much more enjoyable and a lot less stressful over here.
Either way I hope you become a part of the Allods community in general.