Perhaps a development of this could have seen the full logos resolve around and outside the V (or a bit more of them as you've done here) and then fade back to just leave the bit inside the V.
That way they could have retained the integrity of the V but you could still see where the portion of the regional logo in it had come from. More satisfactory than the solution they went for of going for abstract re imaginings of existing brandings to make it fit.
Does anyone know any more about how much different stations were consulted whilst these were being designed? Many stations ended up with their branding unsatisfactorily accommodated and so said no, even though the presentation had been made for them. It seemed in those cases that these were seemingly just sent to them and they have no input into the design.
Yet the Thames XXI branding from the summer before these idents launched clearly was designed in readiness for the corporate look, with the V-shaped Skyline symbol that could then be transplanted pretty much unchanged into the corporate ident. There's no way that was just coincidence. Clearly they knew what was coming and had the chance to be consulted and agree on the outcome so that they could update their branding in readiness for it, and the result was a corporate ident which worked much better than most others.