Has anyone read the briefing paper?
researchbriefings.files.parliament.uk/documents/CBP-7722/CBP-7722.pdf
Overall the rates revaluation will not increase revenues because for one thing the multiplier drops slightly in England to compensate for the average increase in values (in Wales the multiplier is up slightly as average values have fallen) and for another the 100% relief limit doubles from £6000 to £12000.
The problem appears to be one of winners and losers, especially as some of the losers see a huge increase because they move out of a 'relief' category.
My own property sees a small increase in rateable value which is more than covered by the 100% relief.
Maybe it would have been fairer to leave the 100% relief figure at £6000 and reduce the multiplier by a larger extent but there would still be winners and losers.