Cycloid leans more towards a support caster.
I would have to disagree, for being a support caster it's very expensive. It can't really damage ground units in any way except a low damaging tornado. I say it leans more for an anti-air unit, however with the recent patch it isn't very usable anymore.
For suggestions, make it where while the V is in possess, pressing attack will not interrupt it's ability, it's very annoying to carefully box certain units to avoid wasting the possess.