BBlast shield doesn't work just got killed by a c4 i had 100% health and the guy that killed me did NOT have the danger close perk. What's the point runing a perk if it doesn't work.
Rumor has it that it will work so long as you aren't taking a direct hit but I agree that it's a rather weak perk in that regard. Flak Jacket has always done a better job of protecting you and Blast Shield has always been it's anemic younger brother. It probably won't get any better even though we all would appreciate it if it did.