I think Brailsford would largely agree with Cooke, as he says much the same as her in the Cycling Podcast this week.
Abuse of the TUE system should stop but, as yet, no-one has proven that it is being abused. Froome has had 2 TUEs in his career so far so I don't think he's abusing it.
http://www.theguardian.com/sport/2015/mar/11/circ-report-anti-doping-cycling-nicole-cooke
Nicole Cooke is an absolute legend. It may make Brailsford choke on his cornflakes but so well said, every bit of it.