There should be bonus cash and XP for squad play.

The fact that most people didnt even know squads were a thing is a whole separate issue buti think not required but incentivised is the best middle ground between being forced into a squad and having squads be an after thought.

Something similar to how some arma servers reward XP for sticking within 50m of your squad.

Maybe you could be rewarded X% more money and xp for kills and team focused actions when in a squad and playing with them. It would solve the problem of 25 Un squadded solos sitting on the tower fob with the mobile spawn vehicle doing nothing and actively losing the game