I think with PLers there's just more in general, each successive TLP the box crews get a bit bigger and more numerous, the PL crews get more numerous etc. Even casuals are boxing more because they realised they need to if they want to get more stuff done.
I'm not even sure the huge increase in population is more than a marginal increase in humans, just a big jump in characters per person being "played".
I don't recall Beastlords having issues finding groups, they are actually pretty strong in the group game, you get slows, an extra tank, some buffs, not terrible DPS, most of their DPS issues are in raids due to MoTM. Good ones with gear can actually tank if they know which spells to cast, slow + incapacitate is decent aggro for example, bandolier in a spare set of weapons with stun augs and you're solid.
I stand by my Wizards being shit at sustained group DPS early game before focus effects and AA. But they will be really good starting Luclin, use rains still but with max FT, crit AA, familiars etc they will get a lot better, a raid geared and paying attention Monk, Ranger, Mage, Rogue will still probably beat them over the long haul though.
Still have that AFK shitter stigma to contend with so probably won't be first picked.