It's not EU, since it can implement arbitrary algorithms to specify the desired probability distribution of outcomes. Averaging utility is only one possibility, another I mentioned was median utility.

So you would take the median utility of all the possible outcomes. And then select the action (or series of actions in this case) that leads to the highest median utility.

No method of specifying utilities would let EU do the same thing, but you can trivially implement EU in it, so it's strictly more general than EU.