Let's be real, most of these arguments distill down to "I really want this particular thing, so I shouldn't have to go out of my way to get it". There's no actual argument overall as to why these rewards should be shifted down, no pros/cons; it's literally "I will do whatever it takes (except the thing that's actually required) to get the item I want". If the coveted piece of glamour hadn't been available from savage, there wouldn't even be a conversation going about whether or not it's fair. The complaint isn't that dyeable gear drops from savage, it's that people don't want to have to put in extra work to get something they happen to want. If the coveted gear had been a PVP reward, the complaints would have then shifted to "but I shouldn't have to do PVP to get glams I want, put it in a dungeon or on a vendor." And, "I want a thing, but I don't want to do the work to get it" is a terrible reason to change reward structures.
This game is already one of the most egalitarian MMOs out there (which I love). You want your kirin, your firebird? You can get them without even having to have the skills to clear current content. You want savage Alexander gear? Go in with a handful of FC mates on a whim. Folks will be able to get the things they're arguing about now insanely easily in a couple of months; if they don't want to wait, they can learn the content now. My friend and I started learning current primal EXs because we loved the wolves, and didn't want to wait for 5.0 to get them, even though we don't usually do high-end content. While I'm 100% for all of the content being made accessible after the fact as it currently is (i.e. through unsyncing and overgearing) and I hate the arguments that "I want my ponies to always be a status symbol" even though they're 3 years out-of-date, a game with absolutely no "high-end" rewards for its difficult content is a terrible idea. And the argument that "oh, they can just make something else the reward instead" is... nonsensical. There's absolutely no inherent difference between giving dyeable gear versus glowy gear versus mounts versus minions versus whatever else comes up; the only difference is that someone has decided that they want the one thing, but not the others.
And that's just self-centred and small-minded.