There’s a topic, but I can’t find it.
Make clear and working order of creatures cast and publish it. (The one that’s in place is bugged.)
I for one vote for cast-based order, later cast/acquired creatures first. Because I like ‘Act of Treason’ 
I definitely think it should be something you can choose. It’s annoying when I have my Relic Seeker buffing itself when there’s and Enlightened Ascetic or Iroas’s Champion it could be buffing. It’s also annoying when I have things die from falling off a support.
Other: it should be player choice.