I always appreciate developers trying to keep a game fresh, but thus far this update is a massive bust for me. It's not enjoyable for the casual player, who has typically played level 7-8, to suddenly find level 6 unplayable because of the constant burrowing/popping up and killing you before burrowing again, all while a dragon rains down fire and bile from above. Just tried a level with a good foursome and we couldn't even complete it because of the dragons. This game feels unplayable right now because the balance has been completely disrupted. The dragons wings are supposed to be a 'weak spot' but can take reload after reload of ammo from the machine gun and heavy machine gun. I'll wait until they do something different before playing again.
