As far as the Noble's healing, I'm going off your quote of " It wouldn't heal for at least a year".
As for Schrodinger. He was blinked out of existence and STILL is able to come back. Issue 9(I'm pretty sure) of the manga, he absorbs Schrodinger unknowingly and fades from all existence because since Schrodinger no longer has understanding of himself, Alucard no longer does. Even through blinking for existence, he comes back with the powers of Schrodinger. i do not recall making any reference to time travel so I have no idea where that has come from.
Since it cannot be established the extent of D's ability to negate regeneration against Alucard's ability to reform. Therefore it cannot be successfully argued that D can ignore Alucard's healing, no matter how much you want to argue for or against it as they have never encountered each others powers. Ones similar, but not each other.