i can see both sides of the argument how about you have the ability later on to get 2 versions of each summon like for ex: you get shiva summon.. for the first few lvls of shiva you can only call for one time massive damage attack with a big huge EPIC avatar then later on in higher lvls maybe a quest pops up to where you can strengthen your power and allow a smaller version of shiva to fight along side you and stay with you till you tel/zone or even put your weapon away.. just an idea...