I think the n00k issue has been put to bed ITT. The B-29 will probably be added, although I hope much, much later, after the huge gaping holes in the plane set are filled. It will rightly be perked heavily, and after the initial rush of use (and getting shot down left and right as Chalenge states), it will likely be relegated as a hangar queen. Seen infrequently, as other bombers are as capable, and don't cost any perkies.
The only ones clamoring for the B-29, fall into two camps IMHO: the, "It was the iconic bomber of the Pacific theater" camp, and the "OMG! the amount of perkies I will get for shooting them down in my PEE-fifyone," camp.
Will it get added...Yes. Should it be added next...NO, the gaps in the early war plane set, the VVS, Italian, and Japanese plane sets, should take precedence over another American bomber.