Go for it, i T3'ed iron man and have no regrets even tho he is mostly just sitting there except for story missions haha. I have enough materials again but now am super cautious and am saving for when i am 1000% sure
Absolutely. I don't care how bottom tier Songbird, Mockingbird or Jane Foster are, I'd T3 them all asap.
Though I'd imagine it'll be Capt. Marvel who will get all my CCFs next.