I did the same change and it's awesome if you run in Soresu. Much better in both PvE and PvP.
http://www.torhead.com/skill-calc#500cMuZhGM0M.1
31 - finish off Lunge for the cheap riposte
32 - take warding call
You got to be abit more alert, with full defense you can pretty much just watch tv while playing. But with this build you got to pay more attention, if you use your tools right, you will still have alot of survivability but with much better DPS.
I use Kira, on hard mobs, send her in first with shield, I build some sunder and steal aggro when she's 50% health.
Do not forget to use your stuns, force push + leap, and that force stun-thingy.