It seems to me that the basic point of randomizing the New World is not to simulate some sort of accurate geological model, but to simulate the lack of knowledge Europeans had, and thusly, the player.
Explorers don't know about plate tectonics. They don't know about weather patterns, desert zones etc... Adding real life rules to creating an 'accurate' model based on present day tectonic plates is just a crutch to give some players 'advance' knowledge of the New World. Knowledge the explorers just did not possess.
If you want to remove some inaccuracy, how about the one where the explorers don't have to return to the home country to show there discoveries? As it is, It doesn't matter if your conquistador/explorer is lost, you still get his discoveries.
Actually, no. If anything, simulating real-life geomorphology would make the New World harder to predict. Right now, it's easy to wrap one's head around the mechanics of continent generation: a few large blocky landmasses with deserts in the center, no (visibly) complex island chains. From the two maps we were shown, continents seem to be centralized towards the Northern Hemisphere as well (the EU4 map shaves off about 10 degrees latitude from the southern hemisphere, compare the location of Cape Horn to that of Tasmania, the Americas should be much farther south). Having a tectonically-generated New World would be much more exciting to explore and potentially open up many new strategic opportunities from a geographical standpoint. Granted, I realize the difficulty involved in that kind of endeavor, but still, I think it's a nice goal to work towards :happy: