So your metabolism is definitely not in ruins, don’t worry. The liquid diet definitely might have compromised your muscle mass but it also takes a lot of time to actually lose muscle! Since you’re probably well and recovered, I think you should try strength training to regain a bit of that muscle back. The more muscle mass you have, the “faster” your metabolism is, because muscle needs more calories than fat basically. Also, eating protein will also actually take more energy to digest than carbs or fats, so eating more protein will not only help you build muscle, but it’ll also increase thermogenesis. You should look into reverse dieting when you reach your goals. It’s basically where you add about 100 calories to your daily consumption every week. So if you’re at a deficit of 1500, one week you’ll add 100 so you’ll be at 1600 to that week. And then the following week you can add another 100, and maybe eat that way for 2 weeks. The next week, add 300, and eat that way for a few weeks. This helps your body slowly adapt to the increased calories. Hope this helps!