I'm laying here after just getting my gall bladder out two days ago. Good news is that while its not fun, its way easier than the sleeve surgery. (I'm 8 months out, 80 lbs down, 70 more to go.)
Heres what my doctor told me - while I need to avoid fatty foods at first (like 2 to 4 weeks), after that initial period of adjustment, I can eat whatever I want. Your gall bladder sends squirts of bile to help you digest food. Without it, your stomach gets a steady drip of bile instead of sudden squirts. He assured me that my body will adjust to this without a problem very quickly. He compared it to having your appendix out - nice to have, but you can easily survive without it.
It doesn't make sense that the attacks wouldn't stop after having it removed if you've confirmed you have stones. There wouldn't be anything there to cause it anymore.
Personally, I was relieved to get it out after the pain of the attacks. It was so stressful to never know when they'd strike and ruin my day!