Just to set out the way I view Legion, the argument could be made that it's Blizzard's best expansion for World of Warcraft, despite some errors (I've played them all). One of these errors, for me, is the design of heroic dungeons.
Here's why:
By the time I wanted to start queuing for heroic dungeons, I'd found that I'd already largely outgeared them. With me being a leatherworker, as well as enjoying World Quests, I found that there was little in heroic dungeons that interested me. Mythic dungeons, and Mythic+, are now the dungeoneering endgame that heroic dungeons were supposed to be on their Burning Crusade debut.
So what's the point in heroic dungeons? What are they there for?
The argument is often made that Mythic dungeons only have one lockout a week, and are therefore not appropriate for pre-raid gearing. This is absolutely true but, as I mentioned, World Quests have largely taken this slot. I wouldn't criticize this, because I think World Quests have been an overwhelming success, but they step on the niche that heroic dungeons are now designed to fill.
The second point to bear in mind is that there are quests that put you into dungeons for additional reasons. Again, I totally support this view, and I like that zone quests lead to dungeons directly. But if this is an endgame function, Mythic dungeons would serve equally as well.
Thirdly, you can't complete Glory of the Legion Hero in heroic dungeons. The achievements are now all designed to be completed on Mythic, which means the chasing of a mount or artifact skin is dead in the water.
And lastly, heroic dungeons are contributing to the horrible power creep that the game suffers with in regard to gearing. Because they're set at 830+, that means Mythic dungeons need to be above that as does LFR. This is creating a much bigger spread of relevant item levels, which is a potential tuning problem.
So, that's my question and concern - that the point in heroic dungeons seems to have been largely overwritten, and I'm wondering if there's something I don't quite understand or properly appreciate.
Any ideas?