It was definitely a weird choice for the leftovers of Titan.
I think if there's one big indicator that there had been a quiet hemorrhage of Blizz talent since the failure of Titan, it's the fact that they didn't steal the shit out of PUBG's BR game mode like they've stolen everything else. Instead, they let Fortnite happen, which is probably more directly responsible for OW's bleeding casual players than any unforced error on their part.
Overwatch is an unabashed ripoff of TF2, but they could've rolled out a BR game mode as quickly as they rolled out a DOTA ripoff had the leadership and the talent been there.