Until we see the FPP salary scales this is all speculation anyway. Looking at recent moves by BA (e.g. Mixed Fleet) I would be shocked if the FPP did not reduce BA's pilot costs in some way. Regardless it is still a fantastic opportunity for those of us aspiring to be pilots.
For the debate between the schools, they all do the same job with a similar set-up and cost about the same. I would recommend you go visit them all if you can, or talk to them at the Flyer Show. Most graduates i have met from these schools say the same thing "I'm really glad I chose my FTO" so from what I can see there is no clear winner and I think it comes down to personal preference.