With RID Grimlock, I kind of justified it like this:
He has grabby claws, therefore he has a grim lock (of his hands). I though it was a pretty stupid reuse TBH.

Agreed on group names becoming actual character names, Sharkticon, etc. Blah, use some imagination.

On the otherhand, some reuses are pretty good. BW Ironhide from Magnaboss for example, he was an elephant, who have pretty tough skins.

Scattorshot makes a bit of sense when he's a guy with lotsa guns and spekking errors.