Hey, if a team has no one with air strikes or mobile swawn points or smoke screen, they can be completely chanceless.
So if there are no or not enough players in the team which have unlocked those abilities, I would suggest that there is at least the possibility for such a team to use those at least to some degree.
Of course not so much that the radio squad or engineer gets obsolete.
Maybe they get tickets for each minute the match is running. And with those they could buy the abilities.
(Maybe its necessary to rework all of those abilities to make them available not only for a specific squad or soldier. It seems to me, most players struggle with those anyway and they mess with the balance of the game to much if your team doesnt have them)