Peter -
We are in the second round of proposal review, which will end on 10/31. Then the region presidents have to approve the 2015 proposals in November. The current proposals can be found here:
http://www.zone8.org/events/rules/proposed.phpAs far as tires, the only driving event proposal up for review is Driving Events Proposal #7, which would change the range of 20 point tires from 140-199 to 140-200 (basically including 200 tw tires in the 20 point assessment). There would be no change to the points assessments for 100 or 40 tw tires.
Another proposal which may or may not affect you is Driving Events Proposal #6, which would reduce the "free" weight reduction allowance from 2.5% of your curb weight down to 1.5% of your curb weight.
I recommend that those who care about what class they will be in next year to review the entire proposal document to see if these changes will affect you.