I think it worked out, since as much as I love the whole cast and the ensemble episodes that go with them, there are times when the show needs to break down and really get into how Twilight is the true main character. All the major arcs concern her, all the big changes concern her, and she's basically the one who's had the most growth (forced or otherwise) over the course of the show. So as long as they stick to that for the finale like this, then I think it's good. The group adventures (which led to this moment and were still well referenced) will be back in action for the majority of next season anyway, as they are every season, so we're basically getting the best of both worlds.
Overall, I did like the finale. The fights actually had some heft behind them, and I'm the sort who's felt that every other instance of fighting in this show has been little more than filler. And even though it's still walking that fine line between keeping the status quo and actually changing things up, the changes should prove to be very interesting down the road. Of course, overall I'd still place the episode somewhere in the middle were I to rank the season, and the Season 3 finale remains my favorite (that one kept the scale at just the right level to be really effective, and I'm a sucker for musical episodes), but this one still brought the goods.
So, a good cap to a great season. Here's to more. In the meantime, time for the long break, wherein I will try to actually get back into writing fic again.