The only thing I could suggest are either more health orbs, or they give more health from the start. Granted, the upgrade is good, but it could use some tweaking.
The clicking is unresponsive... I can hardly customize and I can't even start my game without clicking 50 times. It's a shame, but knowing Thing-Thing I believe it'll be fixed.
Obviously, we do not want to mislead players, so we'll look into it. Are you ok with playing one Faction for free and purchasing additional Factions?