After some recent issues I've made a decision - drafts will no longer be automatically saved. Instead, much like a drawing program, there is a save and load button. The save button will flash when you're able to save (to stop people from just spam saving the same thing), and this will save a draft like before.

If you were wondering why the site was slow before, the auto saving drafts accounted for most of it as some bots/rogue individuals decided to exploit it to almost crash the entire site. This solves many issues (such as drafts not saving correctly/at the right time) and lightens the load on the site quite a bit.