So eventually we're supposed to be getting Levels Higher then 13, there begs the question of what will make it Worth it. Sure, a lot of Hardcoar PVP players will do it entirely for the bonus, but for casual people, 13's a struggle. What could make it worthwhile to Us.
Another EISO Slot? Yeah, this is probably about all we'd get. But, how about an extra Hero Slot next to the EISO slots? or even a Weapon Slot where you can equip the heroes.
This could lead to a plentitude of interesting combinations, such as the famous Fastball Special.
Idea courtesy of Mr Stove, who blundered asking whether he should replace Mystic with Sunfire as if Sunfire's equippable.