Yup, that's correct. That feature was abandoned. All this mod did was to reenable it. And of course abandoned features have a habit of breaking, which is what happened a few patches back.
It's not currently on the list to be worked on. If it does show up, it'll be further down the road I'm afraid
Well that sucks, I really enjoyed that feature. It was quite unique as well, I thought. I was really hoping PA was going to be the first RTS game with really comprehensive 'formation' control. Oh well, thanks for confirming the feature's status, I appreciate it. I will hope that 'further down the road' it will get some love