I didn't think I'd miss Kaiten that much...

[Semirhage]

How can you, on one hand, consistently call out WHM for being the stalest white bread imaginable, and then on the other ask for other non-caster classes to have their main filler be reduced to that same white-bread status?
.
.
.
The only way to justify PVP combos in PVE is if SE were to add new actions that would replace that hotbar space, that are interesting to use

You have answered your own question. What makes you think giving the stalest white bread class imaginable a 1-2-3 combo would in any way suddenly make it acceptable to play? For the same reason 1-2-3 combos aren't magically made interesting or choice-facilitating by the sheer incredulity of non-monk melee players. Push for better combat.