This seems like a rather clunky solution in my opinion, because I imagine there’d be a lot of nuance in how maps are designed for each particular mode that simply making them symmetrical wouldn’t really work.
I’d much rather wait to see what the new game mode is, and then see if they follow through with their supposed original proposal of remaking the 2CP maps from scratch for it.
I mean… all 2CP Maps will return to QP & Competitive in the future according to the OW2 patch notes. My guess is that they reworking / adjusting them for the new unannounced core game mode.