What if all classes were given two more skill slots that operate as "passive" skills with permanent buffs? This would open up more skill slots for fun skills or damage skills, and reduce some rotations by 2 skills, effectively raising the floor for players who struggle with rotations and DPS.
Each class could have 2 designated "buff" skills that fit into the toggle slots, with a couple skills receiving updates to how they perform. Here's a rough outline of the potential direction:
Dragonknight - Spiked Armor and Inferno
Nightblade - Blur and Siphoning Strikes
Sorcerer - Surge and Lightning Form (Hurricane morph continuously resets size)
Templar - Rune Focus (update to become cast on self) and Sun Shield (update to provide shield every [x] seconds)
Warden - Arctic Wind and Lotus Flower
Thoughts?