I believe, though would not swear, that Deutsch and Dewitt have reinterpreted Everett so that although there are infinite choices/outcomes not all of them are chosen an equal number of times. Some outcomes are chosen more often than others.
If there are some outcomes that are chosen with greater frequency, obviously the chance of any given outcome occuring is not equal across worlds. If you buy that, than our experience of free will (subjective as it may be) lies in the idea that the more heavily weighted outcomes are more "likely" to be chosen.
Whether or not free will
itself exists, I have no idea. But I do believe that the
experience of free will most certainly does.
(It made more sense when I was just thinking about it
)