My DC is now 7, is deaf, with enlarged vestibular aqueducts.
All going fine, so far. Balance has been good, DC is reasonably coordinated, and we don’t see an impact.
All that being said, we haven’t an appointment with the ENT to follow up on this, and see how it might impact DC’s swimming and rollercoasters - apparently those activities can cause some significant disorientation for kids with EVA, so following up on that in the coming weeks.
FWIW, DC has been really really reluctant to submerge their head when swimming, bathing, or showering (long past the age of my other kids). If they are having disorientation, that would help explain it…and make me feel like less of a parenting fail on the swimming.