A warrior can do without Tactical Mastery, it just requires some anticipation of moments when stance changes will be necessary and when possilbe dumping spare rage into skills before switching. For instance, if you suspect you'll need to intercept soon, hold a bloodrage in reserve for after the switch, or if you charge into a fight, get your demoralizing shout and first sunder off before switching to defensive rather than after. Unbridled wrath can also compensate for some lost rage over time.
My build (at 46 now, so still in progress) is conc blow + flurry, being one of the few combinations that allows more that one "highlight" talents (the other being Flurry+Sweeping Strikes). I'm glad that MS and conc blow are mutually exclusive - it forces people to make some tough choices. Solo PvP my build is weaker due to lost seconds with no TM, but in the chaos of group PvP having a 5 second stun from an unexpected source (people assume MS builds for the most part) is handy.
My build (at 46 now, so still in progress) is conc blow + flurry, being one of the few combinations that allows more that one "highlight" talents (the other being Flurry+Sweeping Strikes). I'm glad that MS and conc blow are mutually exclusive - it forces people to make some tough choices. Solo PvP my build is weaker due to lost seconds with no TM, but in the chaos of group PvP having a 5 second stun from an unexpected source (people assume MS builds for the most part) is handy.