As a player who plays for approximately 2 hours a day most days. I'm able to get to level 100 season rank in about 10 days. After that I'm not earning rewards for killing x number of phantoms, or x number of skeletons and the game losses its sense of progression.
What I'm suggesting is the the lvl 100 season cap is removed, but the cosmetics and rewards remain up to 100. After lvl 100 hundred the rewards are increasing higher gold every or rare chests every 10 levels or so, and a new milestone added to show maximum season rank. This is similar to the PVP rank which is uncapped and enables those players who are not enjoying or don't want to PVP a sense of progression and achievement.
