Something that was in the old Smoogies and is not here now: what do you miss?
It does not have to be a big system. Sometimes it is a sound, a button in a place your hand still expects, a page that told you something the current one does not, or a small piece of friction that turned out to be the fun part.
Some of the answers will be pure nostalgia, and that is fine. Some will turn out to be genuinely good mechanics that got dropped for no better reason than that the rewrite ran out of time.