Your movements are definitely getting better, and your 3D is pretty spot on most of the time. The last bit of your intermediate attempt looks rushed, but the rest was great.
This was pretty good, the main thing that bothers me is how he slows down midway. Remember that when jumping the horizontal momentum stays and you should only ease upwards and downwards motion. Besides of that it looks pretty nice, some poses are a bit weird like midways on the roll and how he stands up, but overall it's pretty well animated.
This has the same problem as the other animation but on a major scale, you overeased the jumps and it looks bad because of it. The arm movements feel off as well, if he's increasing the momentum it's commonly better to move the arms forward before the actual jump to help on the startup, its way more natural while he's doing it midair in the jump.
Still your movements are pretty fluid and definitely improving, good job man.