• Then, there is a big point, that have been already discussed many times: autoconnect sound/midi in jack should really be disabled, or made it possible to choose. Midi autoconnects with all clients, and we have to 'disconnect all' before patching as desired. Same with sound: sometimes, I use pd to make sound in a basic way, and just output on channels 1 - 2, but most of the time, I use it as a plugin, or inserted between several other jack-applications, with particular jack patches. The patchbay from qjackctl save my desired connection, and I should only start my apps and let the connections make themselves. The patch is the power of jack, and autoconnect goes against this philosophy. Also, maybe one day pd will be compatible with ladish/jack-session (the future of jack!).
  

I rarely use Jack, and know little about it. I think you're best bet is to bring this up in its own thread or submit a bug report on it.

you mean a bug report for pd-ext? which thread?