Well when I for one play an RPG like the Elder Scrolls, I want variety in the setting. Elsweyr seems too tropical for me. If they could set it in all of Tamriel, where Elsweyr was just one setting out of many, we'd all be satisfied.
But Cyrodiil is just as varied as Elsweyr would be.
In Cyrodiil you have snow and grasslands. Thats it.
In Elsweyr, you have vast deserts, jungles, oceans, grasslands, ect.
BUT LET ME JUST THROW IN A TWIST!
What if, sense Elsweyr isnt as big as Morrowind, Cyrodiil, or Skyrim, what if they combined Elsweyr and Valenwood in one game, and have the story spread across both.
That, that would be lovey.