It all adds up to normality, in all the worlds.

Eliezer, you say this, and similar things a number of times here. They are, of course, untrue. There are uncountably many instances where, for example, all coins in history flip tails every time. You mean that it almost always adds up to normality and this is true. For very high abnormality, the measure of worlds where it happens is equal to the associated small probability.

Regarding average utilitarianism, I also think this is a highly suspect conclusion from this evidence (and this is coming from a utilitarian philosopher). We can talk about this when you are in Oxford if you want: perhaps you have additional reasons that you haven't given here.