I think that's the case as well. The Remnant Trooper especially, is just an existing trooper with some battle damage slapped on, so easy money. (Looks good though.)
My bet is we'll see some dusty deathtrooper figures as well some day.
That being said, there aren't a whole lot of characters on that show without a helmet that I could see being made. The Child, Cara and Kuiil are pretty much it. Personally I wouldn't mind seeing The Client, but that's just because I think Herzog is awesome. Especially his voice. I can do quite a good impression these days, if I say so myself.
And I could see them make a 1:1 Child, just like they did with Baby Groot.