I can live with (even if I don't agree with) everything that has been seen on screen as canon, however I do believe that in NuTrek the "prime" universe that is involved is in itself an alternate universe. So in the real Prime Universe Romulus is whole and hearty. Part of me also wants to put ENT into this same universe, so that the Akiraprise never existed in the Prime Universe, instead some of the characters in the series were onboard the U.S.S. Daedalus
as the first Federation Starfleet ship.
Also at the end of Nemesis B-4 doesn't possess the memories of Data, since the song was in Data's recent memory buffer it was transferred but nothing else took, thus making Data's sacrifice mean something.