One could argue that our current situation is exacerbated by the fact that it is very difficult for our government to do anything. Power is divided between Congress (one house controlled by each party) and the President (Democrat). This means, essentially, that both parties have to agree on anything that is to be done. This leads to major gridlock as neither party wishes to compromise with the other.
If there were less separation of powers, this would not happen. If, for example, we had a parliamentary system where the executive always has the votes of the majority of the legislature, things could get done. If we believe that we need government to do something to alleviate our current problems, we could argue that reducing the separation of powers would help make this possible.