The only thing it really offers is SVT conscripts. The Airborne Guards are just worse Shocks / Guards in their respective role. There's no guard PTRS's or M-42, so light vehicles will bully you all the time. The doctrine has very high munition costs because of the dshk, expensive DP's, weapon crates and skillstrafe.
Giving Combined Arms (my preferred option), you'd be given something that can help in the late game if you're already well established. It won't do much if you have an inferior composition on the field. Add on top of that the high munition cost of this doctrine, it wouldn't be easily spammable.
Otherwise, how about a completely different idea. We don't merge the Rally Point and add no new commander slot, but add the option for Airborne Guards to upgrade 2 elite zooks, how's that?
My point was: 15 muni sprint is not a very strong ability, it's good, no more.
If early game AT is needed maybe an air dropped M42 could fit the bill instead of like the DSHK or something, similiar to the US Airborne.