There's nothing wrong with a shotgun killing in one hit.
Mike I was not talking about Spas I was talking about the SMAW. Don't you ever come up with a very creative load-out only to have someone smaw you? I know you are pretty creative(firsthand experience....) so would you not be Ticked off if someone did that?
Well that's good you didn't mean the SPAS. Yeah I've been SMAWed with a weird loadout before. But I just laugh and change loadouts (if I feel like it. Sometimes I don't).
The problem was that explosive focus was given its defensive capability as an afterthought, which affected other weapons it shouldn't have (HVS45, SPAS). If there is going to be a SMAW or just rockets/grenade launchers in general, there should be a flack jacket or something similar given to players from the beginning. And it should only affect explosive weapons (it shouldn't provide all-around defense).
If there's going to be another weapon like the Phase Rifle, then armor needs to be buffed to better counter it.
http://www.youtube.com/watchmeplaynintendo (Actual game captures - no emulators)