Did a few hours testing with my Merc/TA mastermind today. For masterminds at least, TA has become a very nice set. The new recharges and the poison gas arrow changes coupled with the bodyguard buff have made this set very powerful. I can debuff mobs and easily survive their aggro, which allows me to use the AoE debuffs/controls at the very beginning of fights, which is always the best time for TA due to mob scatter and animation times.
On the buggy side, I do have to report Oil Slick arrow never ignited once, not even when my commando used his flamethrower attacks. It appears to be worse on test than on live.