The flipping, odd walking, etc. are all due to the MBD, and are "normal", as normal as MBD symptoms can be I mean...That's going to be a matter of time under strong UVB and nutrition/calcium absorption, there's really no way to tell how much the physical disabilities from the MBD will reverse themselves, they may never, but the important part of MBD recovery is that their bone density increases to normal levels, which is what is happening now. Advanced MBD recovery is a marathon, not a sprint unfortunately, and you don't know what you're going to get in the end, but he will improve.
As Cooper said you need to feed him steadily and in a slow, healthy way to put weight back on him, and keeping him hydrated is always step #1. The reason for this is because if you just start feeding him a ton of protein it can a most likely will overwhelm his kidneys, and that's how Gout develops, and the swollen toe is worrisome for that reason, though as long as you don't see any more swelling in any other toes, feet, or legs then he's okay on that front. But you have to keep his Renal System flushed with water several times throughout the day, and slowly increase his food intake and protein intake to keep his kidneys from becoming overwhelmed and having his Uric Acid levels start rising. That's the last thing you want to have happen. Just slow and steady water and food, his fat pads and the rest of his body fat will slowly increase and come back, no rush, again, it's a marathon, not a sprint.
As far as the "Exotics" Vet goes I'll be honest, I've lost faith in them all recently, I'm trying to no stereotype, but honestly I'm tired of seeing Dragons made much worse or killed after seeing Exotics Vets. If you trust your vet's knowledge of Bearded Dragon health then that's good, and important. His tail definitely was damaged at the end at some point, but it doesn't look as if there are still any open wounds or necrotic tissue. The shriveled end may fall off at some point, it may stay that way forever. What you need to worry about now isn't the end part that's already shriveled, but rather looking for that hard, dry, shriveled, black tissue spreading above the already dead area. That's when you know you have a problem and amputation may be necessary if the necrosis can't be stopped. But I don't see any sign of that in those photos, but you need to watch carefully for it.
As Cooper said you need to feed him steadily and in a slow, healthy way to put weight back on him, and keeping him hydrated is always step #1. The reason for this is because if you just start feeding him a ton of protein it can a most likely will overwhelm his kidneys, and that's how Gout develops, and the swollen toe is worrisome for that reason, though as long as you don't see any more swelling in any other toes, feet, or legs then he's okay on that front. But you have to keep his Renal System flushed with water several times throughout the day, and slowly increase his food intake and protein intake to keep his kidneys from becoming overwhelmed and having his Uric Acid levels start rising. That's the last thing you want to have happen. Just slow and steady water and food, his fat pads and the rest of his body fat will slowly increase and come back, no rush, again, it's a marathon, not a sprint.
As far as the "Exotics" Vet goes I'll be honest, I've lost faith in them all recently, I'm trying to no stereotype, but honestly I'm tired of seeing Dragons made much worse or killed after seeing Exotics Vets. If you trust your vet's knowledge of Bearded Dragon health then that's good, and important. His tail definitely was damaged at the end at some point, but it doesn't look as if there are still any open wounds or necrotic tissue. The shriveled end may fall off at some point, it may stay that way forever. What you need to worry about now isn't the end part that's already shriveled, but rather looking for that hard, dry, shriveled, black tissue spreading above the already dead area. That's when you know you have a problem and amputation may be necessary if the necrosis can't be stopped. But I don't see any sign of that in those photos, but you need to watch carefully for it.
I Will try to get him a vet appointment ASAP. Should I put him back on the liquid calcium that they prescribed? How could I improve this? 
