Regarding discussion decline, much of it is the nature of forums in general. Not all forums are dying, of course, but many are declining in terms of participation. Also, one has to remember PPGD is a fan comic, and as time wears on the active fandom shrinks. Plus, as the comic has gone on, it has catered more to fans of more cult entertainment than the relatively mainstream cartoon characters it featured.
Another point to note is that there have been numerous hiatuses in the various comics, which leads to people eventually abandoning discussion. It's not necessarily the comic quality which has declined, but when there are long breaks between updates, people generally move on.
Personally, I've been posting slightly more often than I did in the past, because with all those multi-page threads, it was hard to read every post in those threads.
As for this page, it's padding, so there's really not much to discuss until we see where this is going, at which point this thread will be locked.