True that Bamba could guard 4s much easier than Wagner could. His prowess as a rim protector has me hesitant to bring him anywhere but the paint defensively though. But you're right, that would be the best route as opposed to wagner at the 4 as I previously suggested.
McGary competing with JMo and Horford feels a lot different to me than Bamba with Wilson/Wagner. As important as JMo was defensively, he was never a potential NBA talent like the 2 we have now and neither was Horford (even if he may have thought he was...remember those quotes on the Florida transfer lol). If anything, McGary should have gotten way more minutes that year before the tournament started.
Regardless, if Bamba comes the staff will figure it out and it will be an incredible problem to have. Really it would just be the most awesome insurance we could have for Wagner's famous early foul games. If Wagner is hot and off to a good foul-free start, let him go 30+. If not, and he's losing his mind on defense and checking out mentally, enter Bamba and we lose nothing.