I'd say for the hose length that range is good, allows for optimal comfort and flexibility based on different body types. I can't remember what my TIE is set at but I definitely came down a bit on them because originally, as you said, it was impractical for trooping.
I scoured the other CRLs for the RPS-6 Rocket Launcher and haven't found any other approval on it on other detachments. We may have to scratch build that one down the road.