Well now that over time is... over at work, I have time to read and respond! First and foremost, I didn't think that I would get so many responses!
Now, as I said before, the 10X was just a place holder, and not a desire. I have no need to walk a literal three day trek from Seyda Neen to Balmora in game. Granted my timescale being at 1:1 would make that interesting, that's also a ton of land to fill in.
I should do a scale image of what the land would look like with different sizes, and that would help decide what should be done. That said, the one thing I am interested in knowing is "dividing points". Chopping the map, as is, into biome bits, then "pushing" them all apart, and filling in the land in between, as opposed to a straight up scaling up of the land.
Something along these lines. If such a thing is possible, would it be better to do it this way?
Now about that height map. If such a thing can be altered and allow the land to be raised far higher, that would be very very ideal. Red Mountain can become more imposing, valleys deeper, and mountains... well become mountains. So, while it's going to be tested, I'd like to know if that's something already set in the engine, and if that can be changed without mucking up everything already done. As the old saying goes, 99 little bugs in the code, take one down and patch it around, 107 little bugs in the code. My fear of asking for this to be altered is that it could cause other issues. As you are all volunteers, I'd like to not ask you to do things that would cause extra work if it becomes too much trouble. As I know nothing of coding, yet, I'm not sure if what I'm asking for is too hard to do.
Edit:
Increasing the size would make using mods that increase speed more logical in my opinion.