In truth, nobody really knows what is going to happen. If everyone used 100% on the slider now, and voted exactly the same way after the fork but reduced the slider to 12.5%, nothing would change (or at most it would be minimal).
However, there may be very significant changes in voting behavior, not everyone uses 100% (I use the minimum 1% quite often for example, and I will be forced into a weight 8x higher), so it all becomes a question of guesswork.
I agree the way this has been pushed out has been very problematic, including the fact that it was falsely labeled as a "bug fix".
I had this as a reply that was never submitted ... as you can see, our math (thankfully) agrees! I figured I may as well chime in as I had it written ... now if only I could click that button more appropriately ...