Compared to Progenitor, TRE is a LOT better endgame PvE wise. Afaik there are no top PvE guilds on Progenitor at all (according to progression thread on theprogenitor.com). On TRE there are a few guilds on each side with full clears, and some still working on it. I have no number for how many guilds in total are trying though. Of the top5 guilds in SV/TFB NiM rankings, 2 of them were from TRE. There seem to be issues with dedicated players for several guilds, but thats the general state of this game I guess.
Community-wise I'd say it's overall good. Theres a bit of everything, but the majority seems to be polite and helpful. But like everywhere else, your general satisfaction will depend on who you hang out with.