[WraithLord]

I'm not sure I agree. The reason AI may override spells, esp. ones the burn gems is that it was abused in the past (was discussed before so I won't bring the examples again).

Also, specifically for returning, there's the added reason that its currently one of the only ways to counter a telporting SC with S picks.

I do think that the AI reasoning of whether or not to cast a given spell should be made more clear. I found it very frustrating to lose battles or skirmishes due to the AI overriding my scripts.
If the AI reasoning is made clear than the knowledgeable player would be able to predict the effect his scripting will have in various scenarios.