I've done it down to 1000 cfs, and there are still lines in all of the rapids (thanks to Glen Woldridge and his dynamite!). The drops get really abrupt and the slow water moves really slow, but there is plenty of time to make moves in the rapids. Blossom is always funky, and if you get through without bouncing off a rock at low flows your are either a liar or damn lucky, but other than the picket fence it is slow enough you can pivot off most anything.
That said, low flows should not be any real issue this year. We'll be down there to shut down the permit season in mid-October. It is by far my favorite time of year on that river.
Show me your OOOOOO face