The thing that stands out to me is exactly what Brett said. A phase I've seen Brett use is, "Enjoy the float."
Another reason I don't like having bent arms at the top is elbow health. Letting the bell pull a bent elbow straight under partial tension is a recipe for elbow tendinitis. After your initial hike pass to start the set, you never allow your arms to straighten on the down swing, so your elbows are not getting pulled straight as I described above. However, as you progress to heavier bells and, especially, one arm swings, you probably won't be able to maintain this.
Some people may be able to swing with a bend in the elbow at the top and avoid this problem (IIRC Geoff Neupert does) by making sure there is no tension in the arm when it gets pulled straight, or actively straightening the arm before it comes under tension on the down swing. However, I recommend against it because it is just one more moving part that doesn't really offer a benefit and can potentially lead to injury if you don't get it right.
By the way, this is also an issue on cleans, where the elbow obviously HAS to be bent at the top and the arm straightens on the drop, as well as on snatches where the elbow breaks on the drop from overhead and then straightens on the back swing. In both those lifts, having partial tension in the bent elbow when it gets pulled straight by the bell is a potential trouble spot.
