Lots of people seem to be making a straw man out of Panel here, probably because they like JRemote and don't want to see it neglected. I like JRemote too, it is a great app with an interesting history.
From an iPhone, you can click "Add to home screen" on a browser. Single click from this point forward. This means direct access to your JRiver library on every iPhone, included in the purchase price of JRiver.
Unfortunately I don't have time to write out a full response to this right now, but I do plan on writing out something more tomorrow if I have the opportunity.
I don't dislike Panel because it's not JRemote. I dislike it because I've yet to find a case where a web app has offered an experience comparable to a native app, and Panel is no exception.
I do dislike that JRemote has been neglected, and even if it's not intended to be a replacement, that's where the development resources are going rather than improving JRemote. JRemote is certainly not perfect either.
Panel
needs to get native scrolling implemented, and fix whatever allows the whole UI to be dragged around when scrolling.
That immediately leaves a bad impression when using it.
You're right about its simplicity, but that also includes the interface in ways which are not positive.
Presentation is an issue. Information density and richness is poor.
I need to go more in-depth about this, but in half the size, the JRemote status bar displays the same amount of information, the current track's artwork, progress, and both pause and skip controls.
Conversely, when listing tracks Panel condenses Name, Artist, and Duration into a single line rather than displaying it over multiple lines like JRemote does, and does not display any album art.
Attached is an image that shows five different tracks but I have no way to identify them in Panel.