I knew that the change was going to be good, obviously, but it didn't really sink in how good it is until I actually played with it.
A free, instant cast shield every 25-30 seconds is bloody amazing and makes WHM so much stronger. It's up every pull in dungeons, and it's free mitigation throughout boss fights and raids... I know this is all obvious but it feels great to have another oGCD tool, especially one that isn't just raw healing.