Enough with the quotes and immediate replies!
Seasoned Veteran - The shield requirement is a nice touch, but I think the gain from both effects is too much. It isn't that hard to be close to where we were before with DA% if you work at it. Lower the increases at least if you insist on not being able to let go of both effects.
Unshakeable - Go with either duplicating one TSO AA ability or the other - again, not both.
Stance Mastery - Adding a damn nice effect to an already perfect ability does not = balance. What you had before was too much, this is as well. Probably because there is nothing wrong with it as-is.
Seriously, just take more than 5 minutes to toss the original out and the additional 5 minutes you used w/ this second offering and just think about it.