I'd be very interested to know what's missing in PD, since I stopped using Max about 5 years ago.
That has already been discussed many times and i guess everyone has his own opinion on that. Probably some people are even satisfied with the status quo. These are the points that i consider missing in the first place and these are also the fields that i've been working on for the last several months
performance interfaces.
by a script language (a la Supercollider)
greetings, Thomas