Please re-evaluate some of the explorer areas. You've increased the cap to 28, but king's forest goes up to 25, preventing people to get XP if they're higher. However, many explorer areas have a larger range.

Highroad: 20-28
Demonweb: 20-27
Sschindy: 20-26
Vale: 14-21 (!)

Heck, even Waterworks is 1 to 6. Please increase the level range of the king's forest to at least 26.