It would work well as a mid-stage if this were actually a mid-stage build. But it was made after the fact, so no mercy. 
The limbs seem incredibly rushed, really making this look like a loose tablescrab instead of a finished product. I imagine there was no back photo for a very good reason. Overall it feels like a really weak build, both in design and structural integrity, serving only to make the larger one look better, and would have survived much better with a couple more hours on the drawing board.
Some major improvements this could definitely benefit by is to make the legs (yes, I know) a little more consolidated. 2006 pistons would be a great replaement, but I don’t know for certain that they will work since I can’t see the underside of the mech.
No, you silly goose muffin, not those pistons! What, you think you’re gonna get a 24th lifetime comedy award for so bad a joke? Because I am
The arms would, of course, benefit from having slightly more complex hands, and given that this is supposed to be an in-between model having both hands appear more anatomically correct that the three-fingered crane claw hand in the ‘later’ iteration makes the later one, at least in that regard, feel like a step down from this iteration.
Do I have anything positive to say about the moc? Well, yes, one thing: The green lightsaber poles embedded in the old system claw piece with the stud on top looks really nice meshed together like that. In the next iteration of the build I would try to carry over that sort of style.
Get building.