Screw that!! The MP was some of the best I played this generation. SO addicting and fluid! Why not both?
The campaign was great but it was on the short side, the MP doesn't really need anymore attention IMO and the series being built around it doesn't seem to be working for them financially. They could continue to do just as much for the MP as they have but put a lot more resources into the SP portion of the game, hell even a much bigger story where co-op could be included may help bring people in. Sadly a lot of people I know who play BF and COD have no interested in Titanfall because it's too "sci fi" for them.
A bigger focus on SP would only help the MP too, a longer bigger story would mean more areas to repurpose as MP maps.