Odds are I requested this years ago, but I can't find it.
Along with setting pricing on a route to a specific number, add a 2nd box underneath that is +/- x%. Then the actual price used is the price in box A +/-x% from box B. e.g. Box A says 230, box B says -10, then the price is 207.
Then, when we go to the global pricing page and click the 'reset ALL prices to default', have it only change box A, same as it does now.
This means managing prices long-term is actually feasible. You don't have to guess how much the default price might have changed and do a global increase all prices 5% or whatever and hope for the best. You can go to a route, decide it's late-night and will have a 30% discount, and then when you do a price change to a new default level, once every 6 or 12 months or when you remember, it still keeps its 30% discount from regular.