Performance increase? Raster slicing is actually slow right, as you have to process a lot of points... (compare a 200mm cube in Cura with Craftware slicing time and you'll understand the difference)
Anyhow, don't fear, I have no plans to switch to raster. The support code is using a raster right now, and I hate that, it's what causing most of the problems with the support structure generation.
(And yes, I'm back. 2 weeks of no Ultimaker. No 3D printing. I really needed that. Pretty much worked none-stop for the last 2 years. Even if I had vacation, I did awnser mail&forums before. This time I really took time off, which was great)