Further, you need to think about your arguments more.The direction of North to the observer wouldn't change if the longitude lines were curved.
Indeed it would not. You can draw the lines of longitude as wiggly as you like - it's just a convention.
It's not really clear from your map what modifications you have made, exactly, or why. It sort of looks like you've curved everything, thereby keeping places on the same line of longitude, albeit curved. On closer inspection though, that isn't the case, as places that are generally considered to be on the same line of longitude, like say London, the east coast of Spain, and the previously mentioned 0N 0W point, no longer are - the curved lines they are on are different. But neither do the east coast of Spain and London line up with the North Pole, so a traveller flying towards Polaris would be flying over different places. Maybe you could clarify what, precisely, the intent of the map is - are places supposed to retain their current lat/long position, or are you proposing that our current set of coordinates is wrong? And should places that currently align with Polaris still stay aligned?
But to be honest, there's far, far bigger issues with that map. If it's real world observations you wanted, here's one. According to timeanddate (and
https://rl.se/sub-solar-point, the sun is currently directly overhead a position in the pacific around 21S 135W, somewhere near French Polynesia. Hard to pinpoint that exactly on your map, but here's a 90 degree circle centred on that rough location:
Now you might take issue with my placement of the circle - it's slightly south of what I presume to be the Tropic, which clearly can't be right, but I tried to line it up on the right part of the west coast of South America...it should also be roughly half way to Australia...there's lots of challenges.
In any case, the more important point to note is that, according to your description of EA, it should be dark everywhere outside that circle. But it's currently daytime in Australia, which is miles away on your map. Miles away - it's not even close to the circle. And look, here's a webcam from Sydney:
...taken from a still from this site -
https://webcamsydney.comHow can it be daylight in Sydney if your model is correct?
And before you say...how do you know that sun placement is correct...aside from the fact that it's a well-proven model, backed up from numerous websites and daily observations by millions of people...here's a webcam from the Falklands at the same time. It cannot be daytime simultaneously in both Sydney and the Falklands if your model and map are correct:
That webcam is from:
http://www.webcams.horizon.co.fkHow would you explain that?