If a child doesn’t show severe signs of hearing sensitivity, but does show signs of sensory defensiveness as it relates to wearing socks, jeans etc… Is AIT a good solution?

Absolutely, many other sensory areas improve just because of AIT. The sensory spill-over which marks AIT as an intervention, has great benefit for tactile, gustatory, olfactory, visual, vestibular and proprioceptive sensory disturbances.