They've already handled it, there's no mystery here. Because they're decreasing the slope of the power creep it means you'll be going into the unsynced content with only 200% higher stats instead of 1000% higher stats. As Yoshi said he currently does 50K base damage now and will be doing 10K base damage after the change. So during unsynced content, if you hit something with 25K HP, it will take you 3 hits instead of 1 to kill it.
Thats why he said unsynced will be getting "harder".