From Diablo Wiki
I like the idea of a smaller maximum level. If everybody had access to the same number of skill points/traits then the only aspects that would set us apart is ABILITY IN GAME and QUALITY OF ITEMS. The only thing a clvl99 gives is a goal only reached by grinding, and that isn't very fun (for the majority of gamers). ABILITY IN GAME is the truer scale we should use to determine who's better - or QUALITY OF ITEMS since that was the defining aspect I enjoyed in Diablo II.