I don't think the two games are alike enough to compare. I don't know much about Warframe so I might be very wrong here but I believe that Warframe does not have a sequel. Meaning they can work full time on improving and adding content to the current game. Whereas Destiny 2 is in development and would take up a considerable amount of their resources. Anyway I don't mind. If I feel like playing I'll play. If not, I wont.