I don't really feel any button bloat on my DK. As blood I literally have everything bound (just checked -.-) with the exception of pestilence because roiling blood and I still have leftover binds for battle horn, healthstones, target macros, etc. About 40 binds in total which I don't even consider bloated when I look at my shaman who had some 60 binds back in WoTLK.
Do some abilities need to be updated or be more attractive? Yeah, but every class has those, or some that are just outdated after a certain level. Blood Strike is useless after x level, but so is strike for warriors and primal strike for shaman. Icy Touch as frost/unholy could be tweaked to be more attractive, but for 5 mans as blood I have no problem finding uses for it. A random niche, but it's there.
Personally I'd rather they fix up our talent trees (Why the hell are the rune talents at level 75?) to be more consistent with the other classes ie cc line, mobility line, etc. My two cents.