That's what I thought I remember. It does seem like they were a bit overnerfed, but they do what they need to well enough that it doesn't really create a balance issue. It seems like their cost and reinforce should be a little less. I haven't played much USF or Ost since the patch but I think they cost as much or more to reinforce as Grenadiers, especially after BP4. I'd also like them to be able to make normal mines, but OST can't either so maybe there is some asymmetric balance there.
I could see a reinforcement decrease but I wouldn't touch their price. Even the reinforcement reduction would have far reaching implications due to them being recrew dudes so it would even need to be a delicate touch. Anything that can dual wield rack weapons needs to be made cheaper very cautiously