AQ3D has abso-lutely no pay-to-win elements, you cant pay for better equipment, more money, etc.
AQ3D has buy-to-use memberships, one-time fee of $50 for Dragon Guardian, which lets you access the guardians tower, guardian-exclusive quests and COSMETIC equipment, on top of the (admittedly pretty trash) guardian class, which becomes moot once you unlock paladin.
There's premium currency called Dragon Crystal's that gets you COSMETIC equipment.
Warframe is in my opinion one of the top 5 best MMO's that are currently played. Everything that you can buy on the marketplace can be farmed. The idea behind Warframe is to mod your warframe's and weapons as well as actively working to raise your mastery rank, which is needed in order to gain access to certain weapons.
Survival's are how you test how well you've modded your frames and your weapons. I call them 60 minute weapons, which I mod to be effective at killing enemy drones for 60 plus minutes. I mod for high crit chance, crit damage and high status, and finally for raw damage.
Overall, Warframe is an extremely well rounded shooter/hack n slash with RPG highlights.
This was years ago, but I remember getting to a point where it became an unreasonable grind to progress in any way, and I also seem to remember basic things being hidden behind a paywall like inventory space.
It's nice to hear the game is better now, I should try it again. I really enjoyed the combat and the setting of the game.
Currently playing SWTOR and enjoying it. Kinda wish I had of gotten into it when it was at its peak. The free 2 play portion is woefully lacking when you research just how much more access to stuff subbed players have, though. There's a lot of stuff restricted for f2p players. Luckily you can subscribe for 1 month, unlock all the DLCs and such, cancel the sub and become a "preferred player", which isn't as good as sub but better than f2p.
I couldn't get into Neverwinter for some reason. Warframe is good also. Gonna try out ESO soonish.