It would be nice to be able to have one-way / asymmetrical link sets. What I mean by this is that there would be a set of master panels that have regular links that are symmetrical with one another - if you change the content of any one of the them, the others sync to the new location. That's the current behavior. I would propose the addition of a passive link set that follows the master links, but does not move the master panels if the passive panel(s) is moved.
For example, I have my commentary panel set to be a master link (A) as well as my ESV panel. I set my textual apparatus to be a passive link that's following the master panels (A) links. If I move the ESV or the commentary, everything stays in sync (including the apparatus). However, if I move the apparatus, the master panels do not sync to the new apparatus location.
I find that as I'm working through a passage, I might jump around in other panels, without desiring that I move forward in my commentary and scriptural panels that I'm working through. It's frustrating when I move my apparatus forward to check on something because it might not have a verse that corresponds to where I was in my commentary so I have to then go back to the commentary panel and relocate myself to my original position. My work around is that I don't link my apparatus panel and manually sync it up as needed... this works, but the asymmetrical linking would be spiffy.
Sorry if I haven't articulated this well.