The Shaman said:
In my games Use Rope is more than tying knots.
It's building a z-rig to pull raft across a river or move a heavy boulder (successful check allows +4 to STR check),
Sure. Although I'd probably just apply a flat multiplyer to someone's drag weight.
it's rigging a traverse over a deep pit or slot canyon (successful check allows +4 to DEX check to cross)
What dex check? Sounds like a balance check or a climb check, depending on whether you walk or hang (or a jump check if it's narrow enough). And either way securing a safety line is a snap when you take 20 on it, and I don't mean snap in the bad way either.
it's securing a prisoner (opposed check with Escape Artist),
Is there an echo in here? I'm sure I already said something along the lines of "yeah, that's basically all it's good for"
it's building a make-shift corral to keep stock penned (skill synergy with Handle Animal), it's assembling a basket (skill snyergy with appropriate Craft skills)...
So - it's basically not much more than a roleplaying skill then? When someone starts talking about a skill giving minor benefits to other skills, and that being it's only real benefit, I start seeing the name of the skill in parenthesis after craft, profession or perform.
Lets look at some other skills:
Disable device. You disable a device. Any device. Including one that involves rope.
Escape artist. You escape stuff. Any stuff, including rope.
Climb. You climb stuff, including rope.
Balance. You balance on stuff, including rope.
Appraise. You appraise stuff. Including rope.
Handle animal. You can order and control animals. Even if there's rope involved.
Open lock. You can open a lock, even if it's made of or involves rope.
Jump. You can jump. If you want, you can jump rope.
Perform. If you chose, you could even do some fancy performance involving rope.
Ride. See handle animal. Yes, even when there's rope about.
Profession(sailor). You do a bunch of stuff to do with being shipboard. I can't imagine that there's no rope involved.
Knowledge(dungeoneering). Includes spelunking. Yes with rope.
Search. Did I hear someone lost their rope?
Use rope. You do stuff with rope. Unless it's on one the above skill lists (except probably knowledge and profession) in which case you need that skill either instead or as well.
A little limited, isn't it?
For most of your examples, I don't think this is something that's difficult enough to warrant skill ranks. To put it mildly, if I can throw together a scheme for doing something in 5 minutes flat, I think that's the sort of thing that a character with a good intelligence and a take 10 can do with confidence. As a guideline, a character with 14 intelligence can reliably create a longbow without having any training as a bowyer. If you can come up with something rope-related that's significantly more complex than that, then there might actually be call for a skill. If what you came up with is an in-game situation, then use rope graduates to being more than just a craft skill. If it's actually a common occurence, then use rope gets to be a full-blown skill instead of being subsumed within other more general skills.