Great feedback. I climb a little as well (not an avid climber, though).
The only issue that I personally have with level locks for tripods, photography or shooting, is that they can be loud as well as the lever can get snagged on clothing, straps and other things which releases the leg section or at the very least snags and moves or topples a tripod and whatever is on top of them.
Just so I can give my design team your feedback, what is it specifically about the twist leg locks that you don't like?
We do have a concept tripod that I can't give the specifics on that is not a twist lock or a lever lock and is/will be the fastest deploying tripod either market has ever seen. Sadly it's on the back burner at the moment as we want to get our traditional and staple tripod(s) out first. I'll get you all info on that once the patent on that goes through and I can safely talk and discuss with you all.
The twist locks I have experience with wore out quickly, were prone to icing up, easily clogged with debris, and hard to use with gloves hands. Typically lever locks were easier to adjust for use and forget. Also, lever locks can be made low profile/ snag free.
I admit though, I could be off base because of my limited camera tripod experience. However, there's plenty of reviews that suggest scaled up twist locks have the same issues as smaller ski poles and telescoping implements.