This may be the cynic in me, but I feel that with the MCU Fantastic 4ovie being announced, they wanted some Doom synergy. There is a good chance Doom will be the major antagonist of the next cycle of movies, and they don't want any moral ambiguity with the character (but that would make him such a more interesting cinematic character!)
Based on how they treated Thanos, though, that's not their schtick. The villain is just a vehicle for the heroes to face conflict