We can trivially make infiltration commandos be a copy-paste of other commandos, just spawning at 4-men when spawning from buildings.
I mean, the only positive thing infiltration commandos have going for them is the cheesy building spawn & gammon thing. Otherwise, they are strictly inferior to the other varieties (440MP for 4-man commandos and no demo charge).
Yeah, well, they also have the landmatress going. But no Assault, no Heroic Charge (tea & biscuits charge); just the crappy advanced cover thing, which is the worst buff in the game.
The glider borne commandoes may be too much for the already very useful other abilities. Flame + rocket arty + repair. Now with durable demo planting infantry wrecking units....
Advance cover is situationally good but doesn't fit the theme of "mobile assault", raid operation would be nice but then....
My 2 cents.. take away the m2 upgrade for sappers and replaced with raid operations. Make 4 men base spawning commandoes with flamers...