I think I'm coming around to feeling fine with having multiple alts, after getting my 2nd char to 110 a week or so ago. It's really not a whole lot of "necessary" work if you just want to keep a few dudes at a decent gear level. You don't really need to worry about suramar and a lot of the other seemingly "mandatory" end-game content on anything other than your main. Every other char you can just do whatever floats your boat, just make sure your artifact knowledge work orders are rolling and do world quests that have upgrades. The fact that you can bank a couple of days worth of emissaries is also a boost here (although they don't even matter all that much, since doing them just for legendary drops is asking for disappointment anyway.)
Also: can someone explain to me why waiting for energy regen on a rogue feels so slow and painful, despite the fact that I've been playing a DK main and rune regen isn't that much different?
Lucky! Still haven't got the Blood DK one. I don't even think it looks that cool, I just want to have it because I can. The WW hidden one is dope though, I would totally rock that.