Any mages*
Take icelance for example. That spell has a halfish second casting delay simply due to the animation after cast. It was so infuriating for mages that we ended up finding ways to bypass that animation. This is known in traditional MMORPGs as animation canceling, which is done by every dps class ever once it was developed.
Having delays in traditional MMORPGs is fine because you aren’t doing any actual activity, but rather simply pressing a button. In VR, having delays on how fast your physical body can move makes things feel like crap and makes you feel like you can’t get to your full potential (Rapidity rangers, for example). I would absolutely agree with what Cam was saying above; buff ranger inherently, give both scoundrel and ranger a wider skill gap for them to work through equal to that of mage.
Additionally,
I think that this is a great idea. This would fall right in line with a better scoundrel skill gap.