Because, as far as they are concerned, Shadow multi-dot was fine where it was in 5.1. Why they buff SW:P in the first place is a mystery to .. well probably anybody with a functioning brain.As for the SWP change.. ok 25% may have been too high, but we already knew not having that buff left SPriests too low... why not give it a 15% increase?
Maybe Devs were drunk from "pre patch release celebration" and one of them fell onto a keyboard, hence the 25% buff?