I say leave the heavy hauling to the C47 for now, so no field supply ability. But, I'd vote for partial supplies of sorts. Allow the He111 to carry 3 (or 4?) gv supplies, and maybe 5 troops?
On that note... now would be a GREAT time for HTC to introduce the different troop carrying capacities for the different troop carriers. Give each carrier some sort of due in respect to the number of troops they could actually carry. Give goon maybe 16, the LVT2 maybe 12, and keep the M3 and 251 at 10. Since the He111 was in fact used as a transport quite often, why not give it the ability to at least mimic some of that ability in AH???
I think the 5 troops and 3 gv supplies makes sense.