It's a bit OP, but at least a fair amount of creatures are airborne. Most/all dragons (even phase), a lot of air and light guys, flying weapons (I'm assuming). But the new web ability that was given to the two spiders/ recluses is bad. They should at least make it cost life (I consider Life to be Nature) or Earth.
EDIT: Saw it in shop, it now costs 4 Air quanta and last for five turns. Upgrade costs 3. Good update imo.