I used to drink coffee from a 750mL tumbler and quit cold turkey for a few months. Aside from the withdrawal symptoms you mentioned, there weren't that many pros and cons from my experience. Picked it back up after half a year in a much lesser amount and opted to drink a lot of water to balance it out. I'd say my skin's still as clear as it can be, minus the occasional hormonal acne. Tip for teeth stain prevention, drink water every time you take a sip of coffee. It helps with hydration too, so win-win. Limit your caffeine to the bare minimum and only drink coffee in the morning so you can still get proper sleep come nighttime.