40-50 still goes by faster than the rest of the levels because of strongholds and the absurd power difference. The fix didn't fix anything but restrict lowbies from getting any help from within a party. Mobs only need to be 6 levels higher than you for the xp bonus cap, my friend can grab as many as he can and I can pull them off and he still gets full XP/chains out of party.

Getting rid of XP gains with an 11+ level difference in party didn't fix anything at all, it should have just kept scaling down to reasonable levels instead of giving almost full XP. This is why there needs to be proper feedback rather than "GET RID OF PL OR I QUIT.".