I'll attach an image of what I mean:
The figures could normally have the backpacks on while their necks are lowered, and the figures in the photo do have their necks lowered, though not 100% since that causes the heads to point forward and I wanted to have them facing a little bit downward. I'm not quite sure what you mean about the ankles - I can't swing their pelvises forward due to the leg design and how the thigh interacts with the shin, and their feet are where they are due to the pegs being there. I guess I could swing them back using their ankles as pivot points, keeping their feet where they are but rotating them a bit, but the space factor would still be an issue. As you can see in the photo, they're pretty squished in there due to rack's length, so adding the backpacks is just not gonna happen due to the space. The only droids I could possibly fit the backpacks on are the ones at the back of each group of four - there just isn't space between the others, no matter how I position them (unless they're standing).
I understand, the Republic Attack Shuttle and AT-TE I think are the same way, but I prefer it without the voices at the end, that should be about the play choice.
There are three buttons - in, out, and sound effects. So even though the voice does sometimes play after the droids come out, various battle sounds can play at the push of that button, and random blaster fire and explosion sounds play randomly when the buttons haven't been pushed for a while.
The torso shape is considerably different, the TVC torso is shorter and rounder, the lower box is thinner top to bottom, that's what I locked into when I said that.
How so? Apart from the weathering and length of the neck, to me they look really close. The faces of the MTT droids look a little longer in the photo, but that's just due to how they're positioned there. Accounting for the stand and the length of the neck, they're all essentially the same size. I tried to capture it in the photo but was surprised how different it looked - maybe the close-up emphasizes differences that aren't nearly as noticeable in person.