Personally, I absolutely hate these "flat covers", as I call them. They look far too simplistic in my eyes, so, as if someone was trying to put the word "funny" onto EVERY discworld book with a crowbar (I know this isn't working but you get the idea - it's just forced).
To me it is as if someone tried to perform the Shakespearean (spelling ?) comedy of "Much Ado About Nothing" with clowns instead of proper actors.