Yea, this bothers me more than anything else.
You get an emote - you can't disenchant it for blue or orange essence. You automatically get it. That SUCKS. It's fine that I rolled the crap-pot on a chest, but let me disenchant it for 100 orange essence at least. I have like 6 or 7 emotes now, I can't even use them all (and I didn't want ANY).
Then there's the whole fact that Riot lowered disenchant values because they wanted to let us get more rewards. That equation doesn't add up when they've made emotes not only a possible reward, but actually a fairly common one. Pretty BS that they've made chests give you stuff less often AND made the stuff you get worth less when they do.
I was always super excited for chests and even though I never wanted almost every skin shard I ever got, I was never disappointed with my chest rewards. I saved all the skin shards (and disenchanted them all right before the changes to get full value) but had liked having them there and thinking of my skin options if I ever decided to pick up any of those champions. If I got a champion shard I didn't mind at all either because I don't own all champions and it'd save me IP from buying mystery shards to get essence for my mastery 6s and 7s.
Now I get an emote and it's like "okay, that chest was a total waste." Then I get a champion on the next chest and even though in the past that never bothered me (and I got Zoe who I didn't own, so it was actually a pretty big IP bonus for me) I was actually disappointed again because it meant I'd gone 3 chests in a row without a skin shard (as the one before the emote was a champion shard too, although I was fine with that one).