Wow, those mixed continents look AMAZING!!! Unpredictable, realistic, lots of naval gameplay and exploration!

I also think that having a mix of various landmasses will help the AI, as each civ has a larger chance to start in the terrain it's specialized in.
Seeing your great capabilities, may I ask you something? Would you be able to create a terra option?
Something like this:
2:1 "wide" map ratio
60-70% old world
5-10% ocean (impassable with early ships)
20-30% new world
being able to select the mapscript for old and new world
I almost feel bad for asking as I don't know how much effort it would be, but it would simply be amazing. I know there is a terra version of YNAMP, but it doesn't have the small details you provide, and it somehow has strangely wide oceans (10+ tiles wide)
EDIT: After revealing a few "mixed" maps ingame with the console, I can definitively confirm that these are the most realistic maps I've ever seen since the legendary "Perfect World" script for civ5!