Ya mnk mch and whm all got some lackluster changes in patch 4.5. Mnk had the potencies had moves increased should you not meet the positional requirement and the only real buff was the fist of fire going from 5 to 6 percent lol. Whm had the aggro reduction on its healing moves, assize got super buffed and pi got buffed too. Mch was all the ammo bonuses went from 25 to 30 potency, hot shot damage from 8 to 10 percent, and ricochet from 300 to 320.

Usually thats how all late expansion "reworks", it's not changing the core gameplay but trying to lessen the flaws by making what it has stronger than what it was before, to varying degrees of success. Astro buffs in 3.4 comes to mind and same with the blm and sam buffs in 4.4.