I personally think that many of the latest DSLRs are a retrograde step in terms of "usability"
I think the rise and rise of the programmer as designer has not been wholly to the benefit of the ordinary amateur photographer (as opposed to the advanced amateur)
In the way that mobile phones (before the advent of the iphone) have packed more and more features in to the detriment of the original purpose, I think DSLR design has taken two or three backward steps of late.