I am by no means an expert of this game, but IMO it seems like there aren't enough activation cards to deploy, move, attack, pick up, absorb, and do all the things you want to do with any character. What about a rules modification that lets you deploy units using AoW cards instead of the characters activation cards? This rule wouldn't make the decks larger and will give more flexibility?
Having a limited supply of activations for every character before you need to shuffle your deck is part of the strategy. Otherwise everyone would just grab Typhon, grab as many AoW cards as possible and wreck stuff.
If you know you can only use a character 1 or 2 more times before your deck is depleted, you'll think harder on when to use said characters.