Sorry about the astro changes friend, hopefully you'll find another healer u like or end up liking the healer changes.

I was also a big nocturnal sect fan, imo shield healing is easier so it's why I chose astro over whm when I healed dungeons, I hope they keep that move that gives u insta cast for a period of time cause it's been a helpful move for me when it comes to astro.

The sage is gonna be my new healer though cause it's a shield healer and it looks cool, but ultimately that decision will be made once I've got to try out all the healers in 6.0, so best of luck to u pal in your future healing endeavors.