Now there's an interesting question. I've always held that our glorified bodies will not be our current physical bodies, as we know them now, due to the limitations of these physical bodies and due to certain verses, among which is one that states that this corruption must put on incorruption. I really don't think that our physical body, which is corruptible, is the same as our glorified body, which is incorruptible.
Given that Christ is the firstborn of the dead and therefore the first to receive His glorified body, I feel safe to think that our glorified bodies will likewise be of the same manner as His.
As for the rest of your post, I have no problem believing that Christ performed these things simply because I also believe He is God in the Flesh. Walking on water is not a big deal when you have power over life and death, even all of creation itself, but you know this.
I see Christ's miracles as originating from His divinity, so to me there's not a problem with Him walking through walls before His resurrection other than the fact that if He did it, it wasn't recorded so I don't know about it.
His walking through a wall after the Resurrection was recorded though, and given that He had put on His glorified body you can see why I would believe that this was part of the nature of that body. It could be His divinity coming into play again, I don't know, but it's also not possible to say that it was definitely His divinity and not an attribute of His glorified body. After all, the glorified Saints have plenty of advantages over us due solely to their glorified bodies, not the least of which is the ability to stand directly in the presence of God the Father. That is definitely not something that our physical bodies can do, just look at what it did to Moses.
Did the glorified body of Christ appear as it did before the resurrection? I mean, He looked the same did He not? And the body bore the wounds of His passion didn’t it?