The warriors missing has been addressed, the mobs had too high AC for the level, had them at AC 2-5 originally, been moved to AC 0-1. (I've rebooted and you should notice a positive improvement)
However, you will still occasional miss until you get some Base DC, as it's a RNG between MinDC and MaxDC, and you are bound to roll a 0 sometimes.
I felt like removing the whole Warrior ignore AC thing was a positive thing for balance, as previously AC was basically a useless stat (PVP wise), as even if you had AC 300-300 TDB would cut through it.
But, it's something that will have to be tested and tweaked until we get it right.