Right now we have:
ICC
4 great drops + relics (+ weekly cores and bag)
5 people
4-8 mins
Ascended Dungeons
3/4 average/good drops + relics/prestige
5 people
30mins-60mins (or more)
World Bosses
up to 10 average drops (+ weekly chests)
however many are there
5-10mins
RG/BT
6/8 average drops + remnants + relics (+ weekly chest relics)
5 people
5-20mins
These are the main things being run at end game. Right now ICC is way ahead in terms of reward for time. Sure it needs a bit more effort/tactics to do it well. But it is very profitable if you are lucky enough to be in a team that can happily grind there for hours.
Coming from one of the lucky ones who gets to run it most days I think there should be a reduction in what it gives out. I think ICC should be changed to 5 drops but defined instead of absolutes, and keep the flakes/horsey in there. At the same time, the weekly reward has been nerfed to the extreme, that needs a look at too.
Not only would that not over-saturate the large gem market with players grinding ICC it would also drive prices back up for those running RG/BT and give them a bit more coin for their efforts.
Next is Ascended Dungeons. There has been alot of talk and grumbling about loot in there even before the 47 update. It would be nice now if the rewards given out each boss was similar to that of regular RG/BT in that we get an item, a gem and instead of a rem perhaps a flake (random flake either infernal or normal). This would make people/groups more willing to do ascended dungeons again.
World bosses also need a change in loot. I think each gem should have a 50/50 chance to be defined there.
Lastly, I dont do them, but I hear the rewards for both arena and ToC are both still absurdly low, any chance they can be looked at too. Anyone that does them with ideas?
All that being said. I am happy for it to stay the same, and I will continue to benefit from ICC and build my gems