I think expanding Congress, specifically the House of Representatives to a closer ratio (currently 1 Rep per ~750K voters) to the original founding (1:57K) would help in several ways.
It would water down the power of corporate interest. Instead of spreading money around to influence 435 elections, 5,700 or so elections would "require influencing"
This would make representatives more accountable to their constituency.
From an Electoral College perspective, the influence of the 2 Senator vote becomes greatly diminished, preserving the "States Rights" aspect, but reducing that influence to one more aligned with the original math. This would mean the EC should be more in line with the "popular vote."
I'm sure there are other benefits (or even negatives) to this, but in either case I doubt it will happen as changing the makeup would ultimately reduce the power of each individual representative. And what politician has ever voluntarily reduced their influence?