I like the idea of it all but I think you're under utilizing Bladestorm. There's so many awesome defensive abilities for it plus Bladestorm procs elemental damage, right? Currently there is no mitigation for elemental. So essentially you'll be able to kill dual wielding imps with procs and slows. Also, you'll be able to kill snipers\inquisitors easily cause of the talents that trigger when you're stunned\slowed.
Here's my interpretation of your build
http://swtor.askmrrobot.com/skills/guardian#11cke8-dcie2ee3-0
I chose Damage Over Time as the key DPS for this build.
Overhead Slash + Bladestorm + Force Stasis will be used on everybody as much as possible. Especially if you play with a Sentinel friend who can also put their DOTS on people. (A reason why I took out the free force sweep)
(After getting all these off a Master Strike would be the perfect finisher to make sure you can dispatch)
Also I chose Lunge because you're not dealing huge burst DPS (another reason why I took out the free force sweep) Riposte is one of the most under utilized abilities in this game! It does not respect your global cooldowns so you squeeze this in between your abilities. It's awesome! (I am tempted to take out the 2 points in resolute and put them into Blade Barricade)
If you're going to build something around Master Strike because you love it and it's awesome. Then go Full Focus and fight in shi-cho when you're using it.
Since I stance dance a lot I am actually thinking it would be better to take a point out of gather strength and put it into Shien Form. hrmmm.. I might try this hybrid build out this weekend.
BTW, I am currently playing a lvl 50 Valor 68 Focus Guardian on Jekk Jekk Tar. my first character was a commando healer valor 58. I love to PvP :x