I remember this from Guild Wars 2 when I played it, and it was annoying. I was generally stronger the first time I stepped into a zone than I was when I came back many levels later, due to how secondary stats scaled.

Outside of hunts, what overworld content do you feel the need to be scaled down for, anyway? Already happens for fates. Do you really want lv 3 lady bugs to feel as "dangerous" as they were the first time?