Yeah they were but I think Briscoe was the elephant in the room those last six seasons. Jerry orbach made that show his own for a long time, when he died the show seemed to lose something it never quite got back.
As to another season, well if l&o is still on la might fail even quicker than it did, since along side the production problems it would seem even more like a copy, (with more sun) than it did. Also if the original series ended up on USA they might pass on the final season of ci, which would be a shame. (They tossed Goren and co under a bus once to save the main series I can see it happening again).
Svu probably stays much the same, I doubt they could have kept stabler any longer than they did, though if L&O went to USa network you might see a crossover or two to promote the show a bit, since Svu is now the only L&O on a network.