Strangely I am in favour of this, as my Avios now are worth something even outside London, but doing the maths, I was strangely better off with Rewards4All given the average (low) price I pay per segment and the possibility of doing a 30 points All-In booking to flexibly change to any flight that actually suits me (even if tomorrow).
It will be interesting to see just how high the tax will be on the Avios flight, my understanding is that FlyBE will not be part of the Rewards Saver programme...