It's time to move Burrower and Carrier both to B tier. With the loss of hugger combat (the true form of combat hugging, which is running up to a dude who's still up and awake and slap a hugger on his face), and anti body block, Carrier is mostly relegated to traps and comboing with another caste; the latter can be hard to find on the battlefield outside of queen screech.
Burrower is now a force to be reckon with, only needing a Boost Plasma mutation to start hammering out traps after traps (which it can fill on its own damn self). For me personally, it's Acid > Gas > Hugger.