As a sometimes contributor and current subscriber, I can only really respond to your second question Erik.
I find the recent change in Dragon less appealing. I've been playing D&D for over 25 years and collecting Dragon for most of those years. I liked the mix of player and DM oriented material. I like longer articles (and also well thought out themed-issues) that delve more deeply into a subject -- it makes it easier to add that theme into your campaign. I like the color text that often only comes from placing an article in a campaign setting (though the how-to-convert-to-other-campaigns sidebars are a necessary and great addition), but I wouldn't mind if Wizards didn't treat such "campaign"-oriented articles as canon (as long as that decision was clear from the outset).
I, unlike most of the contributors to this thread, like crunch. I like monsters that my players have never seen, but I also like the color text and campaign text that often used to exist. Having the campaign fluff helps figure out where the monster, class, or whatever might fit in my campaign and makes the article come more to life. The old 1E NPC class articles used to be my favorite articles wehn I was younger. I always wanted to play the latest class. I still love that stuff. Consequently, I love the prestige classes. That said, 3E and 3.5E (not just Dragon) have cut back on the color text that provided more context and excitement to articles. I like other crunch like feats and new items, but feel most of those (not all) fit better in the context of a bigger article such as monsters or prestige classes. I like new magic items and spells and am less finicky about them having the color text and campaign text, though sometimes that can be the best part.
I've never been one for most of the advice articles, but I'd rather read 5 pages of Gygax's articles once every few months than one page a month. It is too disjointed. The fiction is often good, but I read so much I rarely read the stories appearing in the magazine, though I don't mind it being there. I agree the quality of the comics has diminished overall, but its not a big selling point for me. I agree on using less recycled artwork, but again not a big selling point for me.
An index would be phenomenal, but I think it should be for everyone online. But also other user aids would be great. Articles that occasionally index something or other could also be helpful or collect tables into easy pull-out sheets....
As for Dungeon I subscribe mostly out of a sense of completeness and to catch the occasional something or other that really catches my eye. I usually craft my own adventures, so rarely use Dungeon for that, but sometimes use the maps and sometimes bits of the adventures for my own campaigns.
So with that said, please don't hold anything I've said here against any potential future submissions. ;-)
Good luck Erik and thanks for soliciting our opinions.