I don't own a Blur, tho I have handled a couple. I do have other Kershaws in 440A tho. I don't have a problem with 440A...not the greatest steel, but Kershaw's 440A is generally accepted to be better/superior than other brands' 440A. Whether 13C26 is a "better" steel?...well, considering the heated discussions on that as of late, I'll just say that many users of 13C26, including Kershaw's 13C26, blades have liked the performance and prefer it over 440A. Most feel it is an upgrade from 440A. The 13C26 blades I've handled were razor sharp. The Blur is a nice feeling knife. I like the design also. I'm not sure what the inserts are, I believe they're a grippy textured tape. From what I've read, the Trac Tec inserts do wear down to a bit as you use it, but only to a point where it's less prickly and destructive to clothing, but stays grippy. 440A's very corrosion resistant and should be tough enough to handle most general users' tasks. I don't pry open locked doors with my knives, so I expect them to last fine.
I would love to see a Blur with all G10 handles, but I don't think that will happen. Contrary to the populus, I'm not a big fan of the Leek. It aesthetically doesn't appeal to me and I prefer a different blade style. But because it's one of the, if not the, most popular Kershaw, it gets the most variations (like a nice all G10 version). Again, wish the Blur came in an all G10, as well as a few other Kershaws I like more than the Blur.