Ah ok, so vortexes, yeah those get dispelled left, right and center, I generally don’t bother with them, but that’s mostly cause the vortex of chaos sucks 
I’d say that simplification in and of itself ought to make the process more streamlined i.e. faster, but only if you’ve got the hang of it, of course. In my games I usually have a rough, if not clear understanding of which spells I want to cast, and where, before my turn starts. Dice role-offs ensue, and that’s it. 5 minutes at the very most (in conjuration, at least).
Magic has an impact - not so much vortexes - but not as much as in 8th, that’s pretty clear by now. A well placed buff or hex can definitely swing the tides of a battle, no doubt.
I’m wondering what in particular was time consuming - choosing which spell to cast? Looking them up? Deciding where to cast them? The cast/dispel procedure? Checking dispel ranges? There just isn’t enough there for it to make sense to me that it’d all take 40 mins to get through it Unless you were exaggerating ofc.
My friend took like 4 wizards in a Khemri army one time (and only once), and they all have abilities to fire off as well. That game did take like 5 hours, but his opponent was slow and they were both new to the thing.
I have yet to see a vortex do anything that a bit of shooting or other couldn’t do instead.