[Note: I obviously am no longer actively blogging but noticed that this has been sitting in draft form for over five years (originally scheduled for 11/26/13) and is essentially complete so I wish to go ahead and publish it. I believe I intended on elaborating on the Gemara's admonition not to pasken based upon a ma'aseh rav unless one is told expressly that it is the halachah (at which point it is considered among the most authoritative pesak halachah, as I recall). It appears, however, that the relevant citation is in the Divrei Yatziv and while more elaboration might be in order, the post is sufficient without it--Yirmiahu]
Perversely, the criticism of the Terumat HaDeshen was turned on its head and applied to the Leket Yosher. Specifically, the Sanzer Rebbi in his Divrei Yatziv (E.A. 39), claims that one cannot rely upon the Leket Yosher as it records actual events and one cannot decide halakha from events. This is inapposite of those who complain that the Terumat HaDeshen is not reliable because the questions do not relate to real events. (http://seforim.blogspot.com/2008/01/in-recent-discussion-in-journal-or.html)
With the understanding that the objection to the opinion of the Leket Yosher was particular to the methodology of the given halachic opinion rather than on the nature of the work itself makes it clear why, "the Sanzer Rebbi himself is at least five other places in Divrei Yatziv cites with approval the Leket Yosher" (ibid).