You seem to be misunderstanding the broader purpose of this implementation of the game. If you want the true classic leveling experience, then go play Era. Obviously SOM is not intended to be an Era clone.
At this point in the season, the XP increase is necessary because a lot of people with 60s are just raid/pvp weekend logging, and others don’t want to start now because they feel they will be way too far behind. The xp increase incentivizes the creation of new characters, be they fresh or alts, which means more active players, which means better server health.
What other “positive change” would you lobby for in the context of the SOM model?