Changes to Flow
While the change is good, its not enough. It needs to be, well timed block OR stunned.
Picture a champ doing a special that stuns and it crits - there is no way to stop the power gain until the stun ends - and then AI may just sit there and block - if its not already l3.
Basically, this could eliminate the followup combo after a crit stun....
My 2 cents.