Okay, then I’d also advocate for leaving it as it is.

I kind of foresee player complaints if somebody makes a level where everyone has to be assigned a Ballooner out of the hatch, rather than them all being pre-assigned.
Then again, I’m not a fan of levels with splat-height hatches, where you have to spend time assigning Floaters while simultaneously trying to build a splatform with some worker lemming. Usually, these levels only require a certain number of lemmings to be assigned Floaters (in this case, Ballooners) before the splatform is finished.
In contrast, I mainly use splat-height hatches if breaking the fall factors into the main solution somehow — rather than just being thrown in there as an additional challenge.