IMO.... if the 30-degree rule passes, and the low-speed scoring remains the same, LS at 30 degrees will require the equal skill as 60. You will see a difference in airplane designs, thicker wings, larger wing area, max wing span. Possibly new innovations or a direction not currently obvious.
It certainly won't change who 'WINS' as some would think; winning is more of the effort put forth than the rules in place, and those that 'WIN' now, will put forth the needed effort to keep winning....and that's how it should be.
Leave the rules alone.... put the effort in to be competitive, 'WIN', or just enjoy the event for what it is.