I think the Putties would make a great squad, either common or respawning unique.
Does classic have a 5(6) figure squad?
Like anything can be done of course. Being able to give the Rangers 2 Life would certainly be a boon. A 200 point squad would be up there with the highest point Heroes, not sure how that would shake up the meta or if they would be willing to push the envelope but it would be fun to see.
Though if the current design group lacks a lot of Heroscape experience (I cannot imagine it is anywhere near the War Council), I would say anything is possible.
Take my perspective with a grain of salt as I am pro hero over squad and prefer the C3G approach that allows them to be individuals, while working as a team but also to be able to pilot their mechs, so a simple squad sounds less cool to me.
Would love to get those miniatures!