It seems that there might be some confusion about the Elite Squad Troopers. There are rumors that originally the Squad members were intended to be clones who were loyal to the Empire. But in The Bad Batch series we see that the Elite Squad is actually made up of human soldiers who wear that blacked out phase 2 Clone Trooper armor. But that's just looking at it from the standpoint of the characters in the show.
For the purposes of Hasbro? I think this was simply a case of them using the current phase 2 Clone Trooper buck with the new heads. I'm fairly certain the one image I saw of the figure with the helmet removed showed that it's the same head sculpt that was used for Rex and Captain Grey. I think if we expect to get the Elite Squad members with their individual head sculpts we might see those in a Troop Builder 4-pack.
Yeah that was primarily why I was asking. I was hoping it'd be easier to do a headswap with some normal humans, since these guys aren't clones. I wonder if someone at Hasbro just saw some early Bad Batch promo images where these guys only ever shown with their helmets on? It'd have been pretty easy to assume they were clones without any additional context. then by the time they learned more it was too late to tool a new headsculpt so they just decided to go with the helmet color and glue it down?
I did find this image on BanthaSkull, looks to maybe be a slightly different headsculpt than Rex and Grey? He seems to have a little more of a snarl in his expression, but that could just be an illusion from the coloring I suppose:

All of that is kind off moot though, as I don't really plan on getting many (if any) extras of the figure since it currently only comes in an expensive multipack with 2-3 other figures I wouldn't want multiples of, Tunghori doesn't have them at a cheap price, and I don't love the VC45 sculpt to begin with.