Clearly you didn't read the sticky post that said not to do "wishlist" posts.
I dont like UB as it is now, not a disease and the dmg it does is hm hm, for 51 talent point its just week.
While I did try out Blood and Frost in beta, I always got back to Unholy and will be Unholy in WoTLK, thats why I dont like our "ultimate".
Tbh Gargoyle is just so powerful for 21 point talent, think it will be much better for Unholy tree if they would just change places.
Make UB 21 point and Gargoyle 51 point talent, and make it last 1 min flat, or remove UB and make some new talent like
50 runic power
10 yd range
1 min cooldown
A wave of shadow magic splashes over enemies in front of the caster, dealing xxx Shadow damage and infecting them with Blood plague or reducing healing they do, or daze them or what ever.