Even the Supremes mentioned that this sounds like a nationalization.
Again this is a bold statement to make and it isn't true, in reality it was an off-hand comment made by 1 judge (Judge Breyer) during oral arguments. Like I said before if SCOTUS really feels this was a takings they should take the takings case up assuming it gets appealed to them (and I hope they do).
I agree with you that the takings claims ruling is a travesty of a ruling and allows the government to confiscate/nationalize the assets of any entity under "conservatorship" in the future for 0 compensation.