The essence is to make each squad at least one small PvE mission, where the player could understand what he should do with this squad.
Of course, the 2nd and 3rd types of squads are no longer so necessary, but you can just make a small historical battle of this detachment of a certain division, it’s not for nothing that we have 4-5 lines describing the history of this division to which the squad belongs?
And you can also make each premium squad with a mission, which may partly explain such high prices for them.
Of course, this is will time-consuming but I think it would be nice.