I think having a bicameral house is a very good thing.
And I know it gets a lot of hate in these parts, but the Senate was never meant to be proportionate. We are a federation of states, it makes sense to have one house be "the people's house" with proportionate representation, and a second house that is divided by state. It's kind of the entire point of having a union of states.
Bring on the hate, but I don't think the Senate is the problem. The corruption in the Senate is a symptom of the problem, but there is nothing fundamentally wrong with it as a concept.