One for All is originally made of two quirks:
Strength enhancement + giving oneself away to another person.
I think if Deku gave his quirk to Bakugou willingly, Bakugou would inherit the quirks Deku has. And if Bakugou gave it back to Deku, the latter would receive his Explosion quirk. However, it's not clear to which degree the quirks would be given away as the give away quirk is also a quirk and definitely can be used in various ways. So if Bakugou only wants Deku to get OfA back, it should be possible for him to receive only that because the giving away part highly depends on the user's will. All Might wanted to give Deku his full power, so that's what he got.