I'm been running the stock Treps on my JK kit for almost six monthes now with not plans to replace them.
I think the biggest reason the Treps get a bad rap is that the stock foams are an absolute joke. Even in a fairly light (bone stock) SCX they stock foams offer no lateral support and excessive sidewall bulge. I was pissed I had to de-glue my tires after a couple packs because I couldn't stand just how overly soft the stock foams were. It was impossible to hold a line when even turning on flat ground would cause so much sidewall roll the wheel would almost contact the ground!
The JK gained several ounces in homemade steel parts, and about a pound in AL wheels. I'm now running the stock two stage foams that came with my 1.9 Rockbeasts. While not perfect, they totally transformed the tire's characteristics. Much more lateral and side-hilling traction (since it's now the tread, not the sidewall that's contacting the rocks). Less hop when "getting it" to bump over ledges. And a smidgen increase in ground clearance. I'd still like a little more lateral stiffness, but it's good enough that I'm not messing with it.
I'm curious as to how many people with a negative opinion of the Trepadors have actually tried a non-stock, stiffer, foam with them?
When I first put the JK kit together I was legitimately concerned that these weren't the R35 compound that my 2.2 Ripsaws were made of. The tread seamed almost hard, certainly not "sticky" by any means. Well, I don't know if it's from the mold release compound or what, but the tires have certainly have a "break-in" period. After several runs, a lot of tire spin, and some tread scuffage they finally came into it.
Just the other day I picked the JK off of the workbench and an L-wrench was stuck to the bottom of a tire, just like a good sticky tire should.