What do you mean 'that's all we have to work with so far'? Flat earth belief has been around for thousands of years, and we know EVERY GPS spot on the planet and we know virtually EVERY distance between points, and those that we don't know, we can extrapoloate using SPHEROID MATH!
Without a correct model to work from, you cannot do correct thought experiments for ANY Of the other concepts that you are trying to 'prove'. It's a fourth grade science fair project fail to say that you KNOW your model is incorrect, but to do experiments from it anyway!
So, to say that you understand your maps are all globe projections, but to use them anyway, is really a huge failure on the part of flat earth thought. It says, "Yes, I know that we know all the points and distances on earth; yes, I know that we know all of the countries and their sizes. Yes, I know that we've had thousands of years to think about this. But we just aren't able to come up with a map other than a globe to work with. And we're still going to do flat earth thought experiments using a globe projection map anyway, despite the fact that NO thought experiment can be correct when the model we are using it incorrect. So, instead of focusing on making a correct map, which should be EASY since we have so much information about the world, we're going to repeat incorrect thought experiments over and over, and call you brainwashed if you don't accept them."
Do you see a problem with that?
No, probably not. Because you seem to have just admitted that you don't see a problem with that.
Who says people aren't working on a flat earth map/model that works? I don't see any problem with using something like the AE projection as a basic visual concept to help people understand the possibility of a different model.