Exactly. I've never ridden one back to back either and I dont understand the principles behind linkage but from what I've heard it helps with adjustment and gives the show a little more travel. But I just don't buy into it being worth 5 pounds. I think to really feel the difference you'd need to ride dungey and roczen style with a little bit of Cairolli mixed in. But like you said, the public demanded it so ktm did it. Whether it was worth it is a matter of opinion I spose.
It's interesting to read up on if you are even semi interested in suspension operation. You are semi right in saying that it helps with adjustment, in that once you start going semi fast with the no link KTM, you really had to have your shock settings close (both internally and externally) or the bike just will not handle correctly. With the linkage, that window is larger. It's great that KTM continue the development of their entire range of MX bikes.