Welcome back, glad you're still coming back to the game to see how things are.
Thanks for reporting the bugs, I believe I got them fixed for the next update. The one where you exit and get put in the middle of the water I just fixed not even an hour ago coincidentally. Still appreciate the reports cause they're things I almost missed.
The feature to turn the followers on/off was implemented too far into development to where I now need to go back to every event that changes the followers and edit it to account for whatever choice you have it on. There's probably some other ways I could get around it sort of, but for it to be implemented properly I'll have to fix all the events. I might have to start doing it a little at a time.
For the tonics and stimulants, I just remembered that I never did add the random element to them cause it was gonna require making a script or plugin for it. The idea was gonna be, for example, that the attack tonic would give +1-2 and the stimulant would give 3-4 or something like that. So the stimulants requiring 3 coins would guarantee getting higher but the tonic would be more cost effective if you got lucky enough. I'll need to re-examine that later on for the next required reset but I forgot about that until you mentioned it.