^that and lets not forget, in the fight where you fought her, one of her dialogue is "i may be tainted but iam still a warrior of light" hinting that she is a dark user but still true to light side (maybe on the moral or attitude side)

i doubt berserker will be the new class considering we already have a class that use axe (WAR) and "role" play somewhat like berserker in a way? looking at the class rooster we know each class has their own weapon and no class wield same weapon.

necromancer have higher chance to be new class, every mmorpg game always has magic class that use dark arts and necromancer might be the thing SE has eye on for next new class (Edda as necromancer job class npc? oh yes!)

as for the Apothecary, if it ever be the new class i hope they change the name to chemist or something like that, Apothecary sound a bit hard for someone who english is not their main lol

one thing iam pretty sure is we definitely have 2 new class because alpinaud and alisae is still on their "base" form while other is back on their "SHB" form after the event, the hint is pretty much there i say. and knowing alpinaud is a healer, the new chemist class for him is probably not far off.

not sure about alisae being necromancer but late story in SHB has her dealing with lfie and death quite a lot so who knows?