Not sure the best way to say this. There really need to be some guidelines on encounters for builders to look at. Perhaps there are, but they're not being followed.Member worlds may use any custom experience system that has been sufficiently playtested. However, the result of that system may not enable player characters to achieve 20th level in less than 6 months while playing 3 hours per day. For new PW's this is hard to ascertain.
I don't think a PC should be able to walk into anyplace and mop up with overpowering/impossible CR monsters by the DOZEN. It's not really a matter of the strength of the monster, someone will beat it. It's only AI.
Why are areas being built where a level 15/20/25 can face and pound down CR 20/25/30 monsters by the dozen? I'm talking stuff that will give somewhere between 50-250 XP, and in swarms?
I remember when getting from LvL 19 -> 20 on Avlis meant killing a whole lotta shit that gave 1-4 xp, and took 3 months. Now it's a friday night.