Seeing as how most melee don't give up any ST for AoE and have significantly better burst than us, no, I cannot say SD was/is an OP talent.
I mean to make Starfall even worth casting, you have to pick two talents (SOTF and SD) anyway. I don't think 2 talents should be required to cast a baseline spell that is still worse than most other baseline abilities melee get.
Setup for Starfall:
- 2 talents (that also greatly lowers ST)
- Moonfire/Starfire on every target to maximize DPET of Starfall
- All mobs must be alive at least 8 seconds.
Setup for most other AoE abilities:
- Press the button. You did 20M burst AoE, grats!
Seriously, look at Demon Hunters, Warriors, any other fucking melee. They have a 1 or 2 button AoE cooldown/spammable and it does monstrous damage. They also don't give up 2 talents to get said AoE, while Starfall is basically unusable at 60 AsP and without SD.