Personally I like the "heavy look" gained by the backpack... I also believe it could been a bit lighter, but a grey/white, or perhaps sand/desert version in addition would be fantastic also.
Allthough an antenna sticking up of the backpack would be nice too...
I am very interested in what kind of gun you are giving him though, have you decided?
The paradrop action is IMO not that important, after all Balou is making a paratrooper so it won't be needed, and most importantly: I guess it's a bit harder to a paradrop animation (just my guess) and the unit would be delayed.....