Nice to hear that you're still around and still developing! But please, please fix the bugs and issues in the current version before abandoning it for iOS7.
1. Browsing view automatically comes out of thumbnail mode for video and images when at individual file level - it should only do this for music (reported first on Nov 17th 2012, post #669 in the original JRemote thread, but also here on April 21 2013, post #113, also mentioned by other people recently).
2. The playlist is not accessible from the portrait Playing Now screen (reported first on Nov 17th 2012, post #669 in the original JRemote thread).
3. Option to "switch zone on device when server zone changes". Otherwise JRemote does not keep up with automated zone changes done by Zone Switch in MC (reported on Jun 15th 2013, post #221).
4. Stop button, to release the renderer and the file (I think it's already been put in on the browse screen? Not at an iPad at the moment).
5. Playlist not refreshing properly when items added (reported on Sept 26th 2013, post #436 - attached photo shows Playing Now saying Track 1 of 4 but only 3 tracks listed).
6. Images cannot be sent to DLNA device e.g. TV, they always appear on the device (reported on Nov 123th 2013, post #552).
7. Browsing an album sometimes results in "Various, Multiple Albums" as a title instead of "[Album Artist], [Album]". (Reported by myself on Nov 17th 2012, post #665 in the first JRremote thread, but mentioned by other people several times here and in the original thread). It may be a metadata problem or a problem in the way MC itself is recognising various artist albums and compilations, but no-one has been able to work out why it happens, so if you could eliminate this as a problem in JRemote then that would be helpful.
8. A FAQ screen for common questions/problems, e.g.
Q. How do I change the views/sorting order? A. Tools > Options > Media Network > Advanced > Customize views for Gizmo & WebGizmo
Q. Why is [MyDevice] not appearing as a Zone? A. Check if the device is listed on the MC server as a Zone. If so, reload JRemote. If not, check your MC and device and network settings, ask questions in Media Network forum, etc.
Q. Why does a track not start playing? A. The device you are trying to play it on does not understand the format, or MC has a problem communicating with that device.
I suppose I'll have to give up on any eye candy such as album covers flipping round to show a list of tracks, instead of a new screen of tracks, or cover flow etc?!
I still feel a bit aggrieved that to take advantage of any new remote control features that will be put into JRemote or that will be implemented as new web-control commands are made available in MC, I will have to buy new iPads all round. I doubt that JRiver will implement MCWS commands that can only be used by iOS7. There are many apps on my iPad that are still available for iOS 5 but have been "updated for iOS7", there must be a way of compiling them so it will work in both. I'm putting more effort into encouraging the JRiver team to get Gizmo up to scratch as I feel I will be moving over pretty soon.