Re: How to request PIC added to MCC support?
my best guess: you would be the first one to get support for an older chip on request.
AFAIK, there is no channel (whether proper or not) to request this.
I think the colleagues are busy with implementing the support for new chips, having no capacity to implement MCC for chips that are older than the start of MCC.
Sorry for that. If you can't find a chip that's sufficiently "similar" to your 18F8722, you'd better start with the datasheet. Otherwise, tweaking the files generated from a similar derivative might be faster. Please keep in mind that MCC is intended "for starters" only, so the benefit of using MCC might not be overwhelming. (Searching a bit in these forums, you will find that a lot of people consider MCC a nuissance.)
PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)