Delia's "skill" comes down to landing your smashes consistently. With how prone you are to having your fully backloaded damage interrupted and damage loss on hit stemming from dropping vigor stacks (leading to wasted time or wasted SP re-applying it), I'd say using Delia's relatively small kit correctly on smaller and/or more aggressive bosses isn't nearly as braindead as your post seems to imply. If every boss in the game was equivalent to an infection-less Eochaid, I'd probably agree with you, though at that point every character becomes pretty braindead.
I'd say Delia has a reasonably high skill floor and a low skill ceiling, with the skill floor having a inverse relationship with attack speed, to a finite degree.
Just my opinion.
Scheherazade wrote: »You still get the same guild feather for free, the new ADDITIONAL one revives everyone in that party.