Currently, you only get 5 glory from a level if you are way ahead of a level's item power.
This is incredibly stupid, since it forces you to keep lower level items so you can go back to these levels and actually farm the glory needed to obtain the bonuses from these systems.
A solution would be to make it so you can never get Positive Bonuses from item power.
(You will have +0% Damage Dealth, and +0% damage suffered as a max)
This would fix a ton of issues with playing multiplayer, and farming system glory.