At this point, you might as well just return Broadway to its rightful owner and create something new as the Industry finisher for all the other civs to use. 
Seriously though, I (along with many others) always liked the corporation idea, and despite having no direct ties or influence with early America, a unique corp would arguably present the most fun option for playing the US. Augmented by their gold theme, America is capitalism / consumerism personified -- let's not downplay the fact that Walmart is emphatically the biggest corporation on the planet -- and I'm sure there are tons of fun ideas we could come up with to help support that. That is the only other option I can see truly promoting distinctly unique gameplay down the stretch for Washington, though it would still be exclusive to Industry, so to be honest, if anyone goes through the trouble to implement a unique corp, it'd probably be best served as the standard Industry finisher (thus leaving current Broadway to America, and all of a sudden my idea doesn't seem too crazy... though I'm not even a huge fan of the current Broadway either, because it doesn't directly promote CV).
Practically though, I have no real issues with what you've already implemented, seeing as it's a massive improvement over default USA, so regardless of all the debate I just want to say I'm very thankful for any work that's been done to try and make the collective VP experience as best it can be.
Edit* I forgot the main reason I even came to the thread was to let you know my pathfinder/scout couldn't traverse mountains (with the required promo) in the latest version.

Seriously though, I (along with many others) always liked the corporation idea, and despite having no direct ties or influence with early America, a unique corp would arguably present the most fun option for playing the US. Augmented by their gold theme, America is capitalism / consumerism personified -- let's not downplay the fact that Walmart is emphatically the biggest corporation on the planet -- and I'm sure there are tons of fun ideas we could come up with to help support that. That is the only other option I can see truly promoting distinctly unique gameplay down the stretch for Washington, though it would still be exclusive to Industry, so to be honest, if anyone goes through the trouble to implement a unique corp, it'd probably be best served as the standard Industry finisher (thus leaving current Broadway to America, and all of a sudden my idea doesn't seem too crazy... though I'm not even a huge fan of the current Broadway either, because it doesn't directly promote CV).
Practically though, I have no real issues with what you've already implemented, seeing as it's a massive improvement over default USA, so regardless of all the debate I just want to say I'm very thankful for any work that's been done to try and make the collective VP experience as best it can be.
Edit* I forgot the main reason I even came to the thread was to let you know my pathfinder/scout couldn't traverse mountains (with the required promo) in the latest version.