Infraction: Multiple violations.
Message to User:
Rule 6: If you don't know the answer to a question, let someone else reply.
Rule 8: There is no character with that name on that realm. Fix your profile.
The change to feather should be an improvement as far as Unholy is concerned; to compensate for the reduced duration, they significantly boosted its proc rate. Unless my rough napkin math is wrong, it will proc more often/more reliably in 5.4 than in 5.3, even taking into account fixing the RC bug. It should be possible to have most disease refreshes happen on stack 10 of the buff, without needing to waste a lot of death runes of Festering Strike.
Disclaimer: very rough math, it's possible that I'm wrong and the proc rate boost and the disease-related improvements don't compensate for halving the duration of the proc.