RH,
Whilst I'm sure a CAT3 ILS on RWY24L would beneficial - what help would that have been today? I would suggest a CAT3 ILS on RWY06R would be more of a priority given the operating modes a MAN. My understanding is that they can operate dual runway 24L/24R in LVP's due to cloud (but not RWY06L/06R as 06R is only equipped for CAT1. They need to look carefully at developing dual runway operations in LVP due to visibility, I suspect part of the issue is runway crossing's and the associated runway incursion risk.
I suppose we have to accept that in adverse conditions there is likely to be some degree of disruption.