Pretty good article. Whedon can be a very inconsistent writer and he does have an ego the size of the sun- but there are times when he's on fire and when he is, he can write pretty amazing television (see Buffy seasons 2-3 and 5- all the episodes he wrote in those seasons are pretty much gold). That said, when he doesn't particularly get a concept and characters as well as he did Buffy, he can fail pretty spectacularly- Angel took off and was at its best when Whedon was basically not involved in the show (seasons 2-4), and the few episodes he did write were pretty awful (see Season 5's A Hole in the World, the most melodramatic and silly handling of a character death ever).
His major faults as a writer are lack of subtlety (no show can hit you over the head with seventeen anvils as Buffy could) and a willingness to completely fuck with his story and any continuity to deliver a theme- just look at the way continuity is completely destroyed in the latter seasons of Buffy and the plotless messes of seasons 6 and 7. I strongly believe that good writers develop their themes from the setting, plot and characters- not the other way around.
But his dialogue is pretty sweet. And he can deliver groundbreaking ideas, three dimensional characters and, well, just the funny. Whedon can handle humour in a serious show in a way that few shows can. And the shows he puts forward generally seem to work. I've heard bad things about Dollhouse, but I definitely need to see Firefly at some point.
Anyway, onto Battlestar Galactica season 1. I'm about eight or nine episodes in and am definitely enjoying it- there have been a few exceptional episodes, a bunch of good ones and two in particular that were absolute shit, but any first season is going to have some of those. Generally good acting all around, believable character interaction, interesting exploration of religious themes, and a hilariously entertaining bastard of a character in Gaius Baltar, whose facial expressions make every scene he's in. My one concern is that not much has even been hinted at in terms of overall plot. I'm okay with that- Carnivale and Lost both certainly took their time to get things moving, and they're two of my favourite shows. But it would be nice if we got so much as a hint towards the end of the first season as to the relevance of Helo's plotline, or who left the note for Adama in the miniseries saying that there are only twelve Cylon models, a plotline that hasn't even been mentioned since then. Oh well... If not, at least Baltar will keep me entertained.