Really sorry to hear you're having issues with regain. Hopefully the surgeon gave you some helpful information!
I just had my revision on the 10th of February, so I can't quite say too much on whether or not its more successful the second time around, but I can tell you the expectations that I received from my surgeon! I was told that it is in fact slower the second time around, but this is okay because that means the weight loss should be steady and you're more likely to keep it off. Additionally, he told me that you'll lose about 10-15 percent less than what you lost the first time around. If you're smaller, the weight loss will be slower since you're closer to a healthier BMI than someone who is way over. Another thing that plays a part is the length of the limbs of the bypass (assuming thats what you revise to and not a re-sleeve). I believe that the longer the limbs, the more weight you lose.
As for me, I had the sleeve then revised to the gastric bypass and its a little different, ngl. Instead of feeling full from tightness like I got with my sleeve, I get the hiccups which is funny but annoying as well since they hurt since im so early out. I'm not hungry at. all. Like, its a little concerning. Hahaha! But I did not get this sensation with my sleeve. I was hungry right out of surgery. Recovering was an absolute breeze. Within a few days, I was walking around like nothing happened. So far, the weight loss is moving at the same pace as it was with my sleeve, so I'm happy about that. Since surgery, I've lost 7kg. Surgery day, I started at 116kg (255lbs) and am now at 109 (240).
Hope this info was at least a little helpful!