AFAIK (and I hope I'm not making a complete fool of myself here)
1 infantry division: usually 3 Regiments (+ support) or 3 Brigades (organic support)
1 infantry divison +4 Bdes = 7 Bdes = 2.3 divisions ....
What you mean is division-level attachments (indeed AT, AA, Recon, Eng, Cav, Bicycle etc.) which my book tells me are mostly Btn-sized ... (German Army 1944)
And these division-level attachments plus the regimental-level attachments already benefit from many, many techs ... Infantry AA+1 for instance does not mean that the infantry gets better at shooting down planes but that the AA-part got better weapons/equipment ...
Adding ONE extra Bde to a vanilla division sounds about right to me ...
Another thing: In-game there are pros and cons for adding a Bde, most of the time they're just not cost-effective ...
and actually I think that vanilla inf should not be out-performed by a single added Bde (as is the case with artillery) and should therefore have stats that are relatively high when compared to a current vanilla div (with respect to an added Art-Bde in both cases)
On another note: Some of us forumites have deducted from one of the screenies (the Canadian one) that Brigades are now constructed seperately from the normal divisions and maybe will be attachable and detachable ... this perhaps might enable the player to attach more than one type of Bde ...
we (I) might me wrong of course ...
