Good morning. Nice to hear from you. Of the two, I would have the bypass personally for two reasons. Even though there's malabsorption, I would be petrified to live with diabetes, if I were ever to get it.
Secondly, if you already have terrible reflux, the sleeve will only make it worse. Luckily, the bypass is a cure for that too.
Hope this helps and please feel free to talk if you need to. I'm in the same boat with fear about this bypass as well but I know lots of people that have had it and swear that it's the best thing that they ever did because their whole life has changed.
Have a nice day.