Putting aside that the damage of boss abilities does increase when going from 10-25...then should none of the raid CD's scale from 10-25? seems to be what you are implying - i'd be fine with that. They'd have to lower the DR of DA, Barrier, and SLT in 25 man's, or implement some cap on total damage prevented. Cause they should either all scale, or none of them should scale. Blizz felt the inequality wasn't warranted and choose to make them all scale with raid size.