Yes, that could be possible with improved lighting and removal of all possible approach path obstructions etc.. Does SOU have runway centreline lighting at present? I know SEN were hopeful of reducing the RVR approach minima to 550m and I carried out a survey of all RVR data over a number of years which showed that only around 15% of those were between 550m and 750m, so the practical difference it would make in reducing away diversions was not that great.