I am so bummed out right now....I'm loving this CoD so much, except for one major issue, riot shield and c4! It's gotten so bad I haven't found a single lobby without those little fucktards in a 6 hour day of playing. There has not been such an OP issue like this since OMA noob tubers in MW2.
The only way to counter them is to use shield and c4 yourself, and press RB and detonate faster than them. Or use danger close and noob tubes. But using those two classes over, and over and over gets really old, fast. This wouldn't be an issue if they didn't bring back danger close. Blast shield only counters normal explosives, it does absolutely nothing against danger close users (which is all of them)
The really shitty part is I don't think this will be patched...it's only really bad in S&D and S&R, other game modes are fine. So most people don't have to deal with it quite so much.