What came to mind when I read the 'Three's a Crowd' synopsis
If Discord is actually ill in this episode I imagine him being all over the top about it. This drawing doesn't really show that emotion now like it did in the first sketch. The expression on this finished piece is more like "well this sucks...".
I was going to add Twilight next to him rolling her eyes but I already spent way too much time on this and need sleep >.<.
EDIT: Well, to make this accurate all I have to do is recolour Discord and the bed covers blue! (Just saw the third preview clip)