I remember querying this recently (probably with the release of LingQ 2.0), and I don’t think I’ve heard anything definitive on the issue as yet. I seem to remember a few others at the time agreeing that it made sense to them as well.
The request is that the LingQs of the Day only contain unknown words (i.e. nothing with 4 shows up).
If there aren’t any objections, and if it’s not programming-heavy on the implementation side of things, could this be included in the next release of updates?