is there a way to turn on rollback/history controls? frustrating not being able to quickly go back a page to re-read something
No. Apologies, but it was intentionally disabled for a number of reasons. For one, it was causing numerous problems, and for another, Twine's history feature causes a ton of state bloat (which had a hard limit before it causes game/save corruption). The larger a game is, the more History needs to be reigned in, or outright disabled, to allow for increased scope/size.
While MERCANOID doesn't hit this limit, that still leaves the issues it was causing to gameplay and scripting which were beyond my ken to fix.