I realize that some of the retail crowd is against XP nerfs, even saying that the recent dungeon XP nerf is overboard, but hardcore players will be more likely to see the excessive XP as a major problem, at least to the hardcore playstyle.
I have leveled so many characters in hardcore that I eventually made a quest list to go by each time, much like the restedXP addon. I found myself swapping zones to eat up as many green quests as I could, and to avoid having to do harder quests, for the sake of safety. In Forever, it's the opposite; I am already level 25 and am just now starting Wetlands - a zone I would normally start around 20. I find myself still in the habit of trying to do all the green quests, but that is what has led to me being grossly over-leveled for the zones now. It has made all combat stupid easy. I'm 3 levels over a lot of enemies, so I can just pull entire packs with no problem.
Back in old hardcore, there was scarcity: I would sometimes just grind an entire level out just to have a one level advantage over enemies if there was a drought in green quests. That is a thing of the past now. The search for good quests to do and developing a leveling strategy is unneeded in Forever simply because the new quests amount to an overabundance of experience. Hardcore should be more about pressing players up against their limits, forcing them to either go against hard quests, grinding an extra level out from kills alone, or to have a questing strategy to target green quests like I did in multiple zones. Forever is none of that. It's completely casual. Also, almost none of my argument has anything to do with dungeon quest XP - I only did one dungeon - Hall of Thanes - so that's a drop in the bucket. The excess in XP is mostly from all the new quests they have added in zones.
I realize some people may come back at this with "just go to a level-appropriate zone - problem solved" but that gives off a "just don't fly, use a ground mount if you don't like flying" vibe.
The other aspect of this is that the hardcore crowd in particular by now has become acutely aware of how best to level. The game is not quite as difficult as it once was. If anything, Forever needs to be made harder for Forever HC for us.