I am totally a fan of the strength based rogue. This subclass really gives me that beat them with whatever is nearby feel. I love the tie in with improvised weapons and sneak attack, but my favorite is the Meat Shield feature, which basically lets your uncanny dodge to drag an enemy into an attack made for you, something inspired by the bugbear I have no doubts.

The final capstone ability seems a bit mechanically weird, using a contested check to break an enemies spell cast. I think this would have been better as constitution save much like a concentration check, but thats just me.

In any case, this is very cool idea and the mechanics fit well together.