Look at Genesis more as a slot filler for raid pieces that refuse to drop, rather than a main gearing source. It also doubles as a bonus for casual players, that they eventually get to enjoy better gear even if they don't raid above Normal.

If they removed the cap on Genesis, they'd likely have to drop it to 380. Then the casual player, combining it with Alpha, is done in 2 weeks and has nothing to look forward to at all.

The only thing I'd want to look at is raid/dungeon gearing and difficulty. Dungeons are completely irrelevant for gear. Then you have a ton of faceroll sources of 380, then a massive step up in difficulty with Savage/Ultimate with no in-between. Endgame dungeons and an in-between difficulty for raids and even 24 man would be great. Non-savage players would like to have some challenge.