Things I like:

- the aesthetic and pretty effects
- the card buffs because it makes me feel useful even when I don't have to heal
- cards giving me something to do between casting Malefic
- having mitigation on top of having heals and having the ability to shield the party at least a little
- delayed healing in Earthly Star, Horoscope and Macrocosmos
- the fact that I basically never run out of mana between Astrodyne and Lucid Dreaming

Things I don't like:

- the RNG of Minor Arcana
- one button DPS rotation combined with hitting like a wet noodle
- I don't have to use a good 2/3 of my healing tools unless something goes horribly wrong, but that's an issue with all healers currently

I'm honestly really worried about the advertised rework in 7.0. Astro is the only healer I find engaging to play, please don't make it a complete WHM copy.