Dear Alexandre,
Thanks for the note and reporting the new bugs and feature requests. I should be able to fix the bugs quickly and pass them to Miller for the next Pd release. Adding the new functions should happen too. The feature addition may take a little more time.
Having an updated functions section for the help file will be great. I have already started on a document to explain the expr family objects' theory of operation and features and hope to have that done soon too. Stay tuned. I am spoken for till about May 15th, but I should have some free cycles right after that.
cheers,
Shahrokh