Yeah, Stormlight is the first series I've really dived into long before it'll actually be finished. Worth it though, Oathbringer is probably my favorite novel.

As for the novella that's part of Mistborn era 2, thankfully I have Arcanum Unbounded, which i think has all Cosmere short stories so far. I've read most of them, barring the Elantris ones because I only recently finished Elantris.

Speaking of which, the Edgedancer novella was great too. I could probably read an entire full-size novel about Lift and not be bored a single second.