I think Vermont should be named Connecticut, since it covers the watershed of the Connecticut River. The state you call Connecticut can be called Hudson, since it covers the watershed of that river.
Also, you abbreviate both Mississippi and Missouri as MIS.
Whoops. Well that needs fixing.
I should probably talk about what went through my head as I designed this. I thought about the issues with border patrol this country would have. Panama would be near impenetrable with the environment and geography and the amount of border patrol resources that would be poured into one area. Despite this, I actually added a bit of a buffer zone to Panama. So illegal immigration is going to more strongly consist of over-seas travel. Either short trips from South America into the coastal areas of Panama, or coming over on bigger ships.
I also thought the idea of alternate mega-states was interesting. In our timeline New York, Florida, California, Texas and to some extent Ohio are the big states population wise. In this timeline, Mexico would be the largest state by far, though I thought of calling it something else. Meso-America is likely the next largest state. I imagine this came about due to concessions for the annexation of Mexico and Central America, as doing this prevents Mexico and CA from getting many Senators. Though obviously they have a lot of representation in the house.
Deseret just sounds kinda cool. Same with Superior. Lincoln is another state, replacing Alberta. Jefferson is yet another. Westsylvania is also in there and is almost a major state as well.
Territories include Yukon, North West Territories, American Arctic Territories and Greenland.