Vicious Expression (NEW): You and your illusions deal increased damage to foes without boons. Disabling a foe removes 2 boons in PvE, and 1 boon in PvP and WvW.
The synergy of the updated Domination traits are good but in instances (PvP/WvW) where the team has a Firebrand, Guardian, Boon Mesmer (which is unlikely but possible), Herald - classes that have cheap boons available/can stack so many boons in <3s, this trait is useless. The Greatsword boon-strip skills in this update, phantasms, null field, and arcane thievery will probably be enough but will cost a lot of skill slots or because they're a 'ramp-up' or casts/removes boons slow - not be enough to catch players have 0 boons especially against FB Mantras, Chaos Mesmer, Herald Upkeep, Guardian Shouts.
However, I do think that this trait could be viable in "ganking" situations which Mesmers, even before the update, can do; or with corruption scourge/reapers. PvE-wise this is a great increase for Mesmer damage and possibly some viability against Fractals' Vengeance/No Pain No Gain + Chronomancer shatters are still clunky and there seems to be no updates on that, I guess this damage increase could work shrug.
Let me know what you think!