The changes look a little messy but look like they would work. I would leave them be. Clearly they were done for a reason. The third picture, is something you commonly can do when the pads flake off (or if you're awful with a soldering iron and burn them off, looks like that guy did) to successfully complete your work, he was just soldering on that transistor further on down the line since the pads it is supposed to go in were burned off.

The jumpers are a little messy but in the end look fine. For the second one, must be that traces were damaged top-side, but again, I'm just noting that and you should leave it be.

If it boots now, definitely just leave it be!