Game Mechanics: Bard mez has high fail rate

[nichomachean]

Ever since the patch, both version of bard mez (AoE and single target) have an unacceptably high fail rate. With high charisma, I am still experiencing in excess of 75% failure on dark blue cons. This effectively makes bard useless as crowd control, and takes away one of the big utilities which bards are recruited to group for.