I understand that these are not an easy steps to include in the next releases but thank you for noting themabstrax wrote: Hi Lechu,
These are all good suggestions, but except number 3 they all need quite a bit of work and therefor won't be in beta 2.4. -> But they got noted.
Cheers,
Marcus

I would also add one more point - region or multi region rendering of the noisy areas. There could be a few ways of selecting the regions for example - standard rectangular or a selection brush (maybe with feather etc. options).