Should they remove positionals at this point?

[Orbus]

No they stay unless casters can cast spells while moving around without interruption

I mean, it kinda is like that?
Most summoner spells are instant, well, many of them are classified as "abilities" but those are just spells not on the gcd.
And while black mages have to hard cast everything normally, swift cast and triple cast lets them cast one and three spells while moving on a one minute cooldown for each buff, which lets them do it preeeetty often.
Then red mages, well they're all about chaining instant cast spells together.