A short answer to your questions is
- I think you could still consider stabilising your skin further before doing fractional laser (which would be great for you) as lasers being heat-based therapies in my experience does incite some acne outbreaks.. not great if you are still battling the condition.
I think subcision with Radiesse is great- virtually minimal downtime and helps plump up your depressed scars/indentations. my favourite procedure actually.
Winston