I identify primarily as a human being, then as a college student, then as an autistic, etc on down the line. I'm not a nationalist, so "American" is not too close to the top of that list, but it certainly comes higher than my state identity.
I wouldn't want to get rid of the bicameral legislature, but I see some room for reform in the electoral process. For example, instant run-off voting could help third parties become competitive- basically, have people vote several times at the poll, each vote being a contingency vote for if your favored candidate was eliminated in the prior round of voting. That way, people could support third-party candidates without the spoiler effect.
You also have some slight inaccuracies in the way the E.C. works- the Constitution allows each state to appoint electors in whatever manner it chooses, so it doesn't have to be winner-takes-all. However, the way votes are allocated via Electoral College is deeply flawed and distorts votes quite a bit, so that definitely needs to be changed. I did a statistical analysis of the electoral votes in 2000 and some of the results were quite disturbing, with electoral power sometimes not even matching up with the number of voters and often leading to huge discrepancies in the value of an individual vote. So the way we elect a President should probably be changed. As far as the legislature, I have no problem with the current system of allocating senators and representatives in a bicameral legislature.
_________________
WAR IS PEACE
FREEDOM IS SLAVERY
IGNORANCE IS STRENGTH