My take: Voice and Gamma buttons can go, I never use 'em.
FF and RW are great as they are, I almost never use them and really don't see the difference. I almost always leave my music on random, so that one can go too. I do like the new exit button though. I also like the idaea of a configurable button for GPS or whatever. And I agree the space gained from removing/combining buttons should be used to make the remaining buttons bigger not add more buttons.