There's always a big debate on the merits of running lines to the cockpit.
I personally like having the main halyard at the mast. I need to be there to reef the main, and if there were a hockle in the halyard at the clutch when I'm trying to get the main down and the tack reef point on the gooseneck hook, I would be beyond annoyed.
For a hank on jib, I don't think there is as much a problem with lines led aft, provided you have a jib downhaul rigged and cleated close to the halyard cleat/clutch. For a smaller boat, running lines aft can be problematic; for mine, the hatch slider risers make cabin top mounted hardware problematic.
Since I have external halyards, it was very easy for me to add a swiveling cam cleat for my asym halyard. With a bit of extra line, it allows me to hoist and douse from the back of the house if I want. I like the arrangement so much, I will be adding one for my jib halyard.
The biggest drawback to the the swiveling cam cleat surface riveted to the mast, is that I won't be able to hang the excess halyard on the cleat like I do with the horn cleat. I suppose I could just stuff it into a Davis mesh suction cup bag stuck to the back of the house. (I'd use this type rather than fixed, because I'd like to remove it, so it's smooth so I can lean up against the house when lounging in the cockpit.
