Not p2w. Lots of cosmetics. Premium currency can be freely traded between players. Which means once you know the game a little bit it's not that hard to come by it with purely in-game means.Originally Posted by sleutelbos(Source)
Also, Warframe is the only game I know that starts delivering it's main story about 40-60 hours into the game. If anything, I'd at least stick around to see those quests.