You can hope the BLU won't
After all, it's a "mage" so perhaps instead of positional it will have a few casted spells like Midare for the SAM.

I agree it'd be nice to have 1 melee without positional. NIN isn't so bad as it only has 2, and one of them is done scarcely.
So technically as long as you're behind, you only need to reposition once every 30s so it's not so bad.