I also have experimented with the barber-hauler thing. And at one point even rigged up a means to get it done without a lot of bother. But after numerous outings, I abandoned the concept. Reasons were several:
1) I sail solo. Or if with other people, usually not adept enough to understand how to attend the barber hauler. I couldn't do both jib sheet and barber hauler from behind the wheel. Even though I rigged up a system, two lines needed attending. Either to get to the cabin top winches and/or sheet clutches. And also trips out of the cockpit when I wanted to attach or detach the barber-hauler. Didn't feel safe. Standard jib sheet alone = no problem.
2) Sure, the concept is fine if one's close-haul course is in steady direction and with consistent winds for an extended period/distance. On San Francisco Bay: a) The wind changes direction and velocity frequently and without notice. Releasing both the barber-hauler and the jib sheet simultaneously take was problematical. b) Numerous boats/ferries/ships on the bay necessitate sometimes sudden course changes. More than once, the lines got tangled due to the need to suddenly release the sheet. c) Most steady reaches are only about 10-15 minutes duration max. Then have to tack or jibe. Sailing solo, each time caused anxiety.
3) My boat was designed for toe-rail sheeting. Yes, the boat did point a bit better with the barber-hauled sheet angle closer to the center line. But it wasn't not dramatic if one doesn't race. (Or at least is hoping to match the the pointing ability of that J-boat also on the same close-haul course.)
The above notwithstanding, I did last year buy all of the parts to install jib sheet tracks on the main deck right next to the cabin top. The mod will yield about two feet closer to the center line compared to toe rail sheeting. Project got stalled. Primarily because my boat doesn't have a FRP/Core/FRP sandwich on the main deck near the cabin top. Just the top layer of 1/4" FRP. The mod's needed to ensure structural strength can be done. But adds a lot of complexity and time. Just haven't gotten around to it!