Chris, I am one of these new users that lizardmenfromspace is talking about. I am not sure why I like the ZK date UID for my notes but it does tie them to a very specific time. But six months from now, I may have a vague idea about a note I would like to review and would like to search for it. There is no way I will remember the date UID to search for it. Really, no way. But, if I remember some vague thoughts about the content or part of a title that is (hopefully) related to the content, I can begin a search and probably find what I am looking for.
I am also struggling with the unlinked mentions which I think is an amazing tool. If I have a ZK UID or a combination of the ZK UID and a title, there is little to no chance it will be mentioned in another note unless I am making a formal link.
I am trying to sort these things out and feel like I am not making much progress. In reading through this thread I see that greasemonkey made some comments along this line. So, this is my stumbling around two cents!