Hi Ed,
For NG: I tired it for a short time and the first thing I was wondering is, that I have to reload the theme configuration page. No matter what I tries to configure (fonts, header, footer, …).
Same phenomenon for SEO, and especially for Jetpack.
This is more about overall stability. I disabled the plugins and tried to use only your theme and the includes plugins. And, …nearly ten others. Currently everything works fine. No issues. I use the free version of NG, Kyle told me he prefers YAOST, which works fine for me. The only feature I was using from Jetpack was the Performance Module and the Subscription Module. But this was not really working.
At this time I am really glad with my configuration and your support. You can close this issue and let me know how far is the NG integration. I finally would also appreciate if you would maintain a plugin compatibility database for future releases of your theme. That would really be a killer service for all users.
– Harald