I posted this elsewhere, but why not just have us sit at a set "light level" and then have different difficulties (normal, advanced, expert, master, grandmaster) for each tier of gear? The easiest giving tier 1 and the hardest, tier 5. None of this unnecessary grinding for levels to unlock difficulties to unlock higher tiers. All the difficulties are available from the beginning, and you can immediately start grinding for whatever tier you want. If you wanna go straight to tier 5, you can, or you can start with tier 1 and build your gear up one tier at a time. The only reason this new level grinding is in the game is to pad play time, nothing else.