I like current blood and frost. Considering they have barely changed in 2-3 years should tell you plenty about how well they are set up now. The changes to me seem to be simply switching strike names and reducing everything to 1 rune cost/ 20 RP cost. This would pretty much make a pure set rotation with no variation as it would be always holding a spare rune for procs etc. Best thing is DK right now does feel sufficiently different from all other classes and those changes to me would make us feel more like a monk or similar with a set rotation following 2 resources (we currently have 4/5 resources, your change makes it 3 - 2 of which are almost going to be essentially the same to use in rotation)
Best thing I would like to see is the return of the old presences as raid buffs (blood gave healing by % of damage etc) along with other classes which lost those (feral druids leader of the pack, paladin judgements of light/wisdom, priests VT/VE perma regen). Make them adequately weak enough to not be OP but those things were nice.