So, you want to slow down the increase in Pinnacles--here' are some ideas--just make all reservations 1 point/night each and not double or tripled. Sail the repositioning ships empty so that a 15 niter does not accumulate from 15 to 45 points per sail. There was a poster that marveled that in past the repositioning used to sail at max 35-40% capacity. Now they are around 70%+.
With more new and bigger ships, it's creating a larger cruising population which of course generate increase membership in all tiers. Also, passengers with means can afford the many suite cabins. therefore, reaching the upper tier levels at a quicker pace.
To me, this is win win for the cruise industry especially since they are running at almost 100% capacity.
Ps. If Royal was really concerned, they should not have had the double points promotions. Wonder, how many Pinnacles were created during this promotion.