I find since the 40% nerf to Light of Dawn, I don't use it at all anymore. I put 2 points into Eternal Glory for the 30% chance for Word of Glory to not use Holy power, and it works much better than Light of Dawn as far as I can tell.
Some numbers, for those so inclined:
- I have 4856 spell power currently.
- I hit light of dawn for 4.5-5k healing on each target. Usually I can only get 4 peeps in the cone healing, including myself and the tank, so the tank usually gets healed for about 13k or so.
- Word of Glory heals the tank for about 13k as well. With 30% of the time I can heal twice for 26k. If I heal another party member, the heal is for 13k, plus 50% on the tank for 6.5k or so for a total of about 19.5k healing. Twice in a row is almost 40k healing from WoG.
It just seems more useful in every circumstance, since the group heal from LoD is just super weak (5k) and focusing healing power seems to be the way to go.
TL;DR: Is it worth it to spec out of Light of Dawn now? I know some people who are doing so and have not regretted it.