I thought having the SCAR-H as an engineer carbine was quite funny. It's a bigger gun than all of the assault rifles.
Unfortunately, because DICE lists it as a carbine it follows many of the same trends as the other carbines. It has higher damage and range than the other carbines, but it still has shitty ballistics compared to assault rifles it should realistically be out-performing.
I think DICE should have given the SCAR-H to assault and made a SCAR-L for engineer.