i think we need to start from the bottom again
and for 2 other ability is kinda loose option (but still needed the airborne feel)
you can add weapons crate that come with dhsk and M-42 or 120mm mortar
the airborne rally point still fit the theme so its good
but that just my opinion..
with this you have elite unit that can hold its ground in the field (which soviet lack of) and support ability to help the guards itself to tackle most opponents (team weapons and AT-bombing strike)
I agree, the DShK drop is a waste of the slot. A more interesting option is the HQ glider: which can build a DShK, a 120-mm mortar and an M-42, this can also be combined with the Airborne Retreat Point. And one slot will be released for a more useful ability.