I have Alot of them. I usually get the more effective ones with gold orders then purchase the remaining with gold if I feel like it.
They are cool overall.
From current season I only have the semi auto on Stalingrad alies. I m yet to even play with it. Lol
But yeah. Overall they are inferior to fully decked squads.
Same as premium squads overall. A fully upgraded f2p squad will always be better on end game gear.