Costing anything is a problem. What if your avatar is attacking something else and you need it to attack what's hitting you? Having your avatar float over to you and do nothing while you die is a problem.

The Einherjar example I gave in the other thread is a PERFECT example of why a stay command IS needed. Ignore it if you want. And saying 'the one who slept the mobs can cure themselves' is stupid. Asking a BLM to cure themselves is like asking a WAR to cure themselves. It's not their job. The job of a SMN is to support. If you don't cure people, you are playing SMN wrong.

Summoner came out before RotZ. CoP was the only expansion without any new jobs. RotZ added the cloisters.