Teddy Tamgho is erratic, but on a good day, he can threaten Jonathan's outstanding world record.
Adam Gemili is a very recent convert to Athletics (from Football) and I think there's a lot more to come from him. If he and Dasaolu can stay fit, they should drive each other on to faster and faster times.
The only issue I have with Gemili is that he looks a little like he's a bit too overawed by what's going on around. His improvement over the past 12 months though has been very creditable. I'm not sure what I make of Dasaolu - who appears to be fit about one week in four at the best of times.
Should also add that Tiffany Porter's bronze was noteworthy for how hard she worked for it. And for how well she scrubs up when she isn't running.