I’ve heard a number of people claim at this point that it appears that the classic anti-boosting xp penalty was being activated in RDF after the change. They definitely need to fix that. The new level ranges are better overall I think, they just need to remove the xp penalty system (and fix a few of the early dungeons that are putting people into them when mobs are gray level).
I’d also post about it in WOTLK classic dungeon finder - dungeons missing in level range since that’s the thread they’ve responded to and where they announced widening the level ranges after we asked.
I’d hope they’re already aware of this and were planning to fix it already, but you never know.