Basically, after about 1999, KLM lost almost all interest in London Stansted and managed to offload Buzz for a pittance to Ryanair a few years later.
They only wanted the UK connections in to Amsterdam and the opportunity to offload some nearly worthless, early model, F100 and F70.
They then treated the UK employed crews pretty badly.
My thoughts are that Buzz was going in the right direction and would have done very well.
I very much enjoyed my time with AirUK.