Well, finally over the illness to give the 53rd refit of the JH13s a close listen and the balance issue has been resolved [cue: Leonard Cohen 'hallelujah']. Nice to listen straight ahead and overall it's a very nice sound. I'm pretty sure the soundstage has simultaneously shrunk (both in size and 'closed' sounding/feeling). Is that because things are now aligned as intended or another quirk of the fit I'm not sure, but it's a trade off I'm willing to make.
Will say after hearing the same pair in so many different states I really would recommend taking all comments about JHA, or possibly any custom, IEMs with a bolder of salt because I'm really unsure if any of us are hearing the same thing. I still have a JH3A + JH16 on order and will make some comments in comparison when they arrive, but don't know the use to others. If you order either I'm not sure you'll get anything similar. So easy to disrupt detail, tone, separation, etc. and the margin of error inside ears must be pretty small. Thank you evolution.