I know that they fesibly walk, my issue was with them walking on two feet, considering their top-heavy frames, not only will their backs be pulverized due to the gravitational pull of [Planet Name] and the size of their stuff. Not to mention, the center of gravity for most Lovedolls (excluding Jerri and Bratti) is fucked, being higher than it reasonably should be. Hoppi would fare better in this regard, but would still have difficulty standing upright. Horses are quadrupedal for a reason. And even then, they would still have trouble moving with any efficiency at all. (To further add to my point, some people, in real life, get breast-reduction surgery to make movement less cumbersome). In most cases I can only see LoveDolls moving on all fours with heavy difficulties. Making them muscle-mommies (I just felt 5-brain-cells die when I was typing that) doesn't help either, because it increases their weight while not fixing the center-of-mass problem. Just like us humans evolved to become bipedal, losing the ability to walk on 4-legs, I fear that the same has happened to Impuro's subjects, rendering them immobile once more.
Upon retrospect, it's a miracle Impuro's cult hasn't died already, the bulk of their armed forces consists of braindead rabbits incapable of handling moderately complex instructions, their tank-units (LoveDolls) and practically immobile, unable to pull off the high-speed maneuvers promised, their elite hood-gals are more concerned about what Mage is doing than actually ensuring their seat-of-power is actually stable. In my numerous battle-simulations (aka, me, a grown ass man, playing with army-men and Warhammer miniatures while making gun sounds with my mouth, I'm aware how pathetic that sounds.) with these new variables. I have concluded that all it takes to usurp Impuro's throne is 100 or so under-funded malitia-men and women (mostly from labor unions, conservative groups, and other people who don't like the idea of being some decadent god's chew-toy.) all armed with rifles and tractors. Either that, or 2 Russian teenagers armed with a log. During my short time in the discord server, I find frankly humorous that they like portraying the cult as a bastion of strength only the SCP-foundation could defeat, even though there are trees more threatening than the cult when you at it through a strictly pragmatic lense. I'd often get comments about how "no one can resist their charm" when making this claim, but people get desensitized to boobies over time (I would know because it happened to me, thus starting my war against Impuro because I actually sat down and realized how pathetic I am, before ultimately deciding to double down and become even more pathetic by making these stupid posts over-analyzing porn. Brains are stupid. Mine especially) meaning that their seductions would eventually land on deaf ears-rendering their one true strength zilch.
Edit: I forgot to include this until after the fact, but lets entertain the idea that Impuro's units being muscle-mommies and thus retaining their mobility.
(to clarify: in these educated assumptions, I'm working with the logic that the Resistance doesn't have access to any aircraft. Because, if they did have airplanes it would stop being (somewhat) fair fights and become 1-sided massacres.)
Good news: Grab your popcorn, the fights between Impuro and the Resistance Forces are going to a be a lot more entertaining to watch, especially when the armies enter melee range of each other.
Bad news: Humans are known for their adaptability and would equip themselves with longer-range rifles, and since Impuro's army is only capable of using melee, that means that they're at the mercy of Resistance snipers and artillery, so those melee duels would stop happening fairly quickly as the Resistance works to maintain their range advantage. Catti/Bratti "cavalry units" could offset this by a little, but if the Resistance is smart and fortifies with barbed wire, those units will get tangled and slowed to a crawl.
EDIT 2: In short (still assuming aircraft don't exist), any combat between Resistance armies and Impuro would quickly devolve into trench-warfare and attrition until a major breakthrough occurs.