By 2030 it'll probably be 10 lanes wide filtering into the same two lanes at the pinch points. The road planners will be scratching their heads saying "I don't understand it. We've made loads more room but It's still all ****ed up".
We actually need a north-south M60 bypass for those that want to just get past the city or to the outer reaches. I reckon that would flow fairly well and would cut the M60 issues by 30-50%.