this is also exactly the reason why I have not yet started JW6 development of the mod. And as I will give my SGS1 to my wife very soon, I personally would probably never start it.
However, there is some indication ZaneZam would probably take this over completely for JW6. I am in discussions with him on that, as I would appreciate it. But - I know he also pre-ordered the SGS3, so it might be a question of time.
I would anyway stick with JW1 for the time being, seems still to be the most stable and fluid stock firmware.