I personally have no problem with it as I don't think that it gives that much of an advantage in-game (in my opinion of course), and you don't need to modify the game to have access to see beyond the borders. Furthermore, Penicillin_Krillin's 3rd place run uses it.
One thing that may be considered controversial though is that seeing the borders is a workaround to learning enemy summon in EW4 (as the unit spawn is not random, it's set).
If you're going to run the game, I don't mind if you play the game beyond the borders.
HOW TO PLAY
Open Flash Player and drag the .swf file of the game you want to play into it.
Flash Player (link might take a while to load): https://drive.google.com/file/d/1ctK_zXLWaL7IJ4ORf_WYHfIZ7d-Z-QSw/view?usp=sharing
Epic War: https://drive.google.com/file/d/1YyXBS4Xpk7iyDHwWhQgmOLlgQpD8sATT/view?usp=sharing
Epic War 2: https://drive.google.com/file/d/14LBsYq_xY6c4TiSo4YKag7tlxj2kebwi/view?usp=sharing
Epic War 3: https://drive.google.com/file/d/1Z20yX4iCXgUa7P5s4asUMv60Xn54gat3/view?usp=sharing
Epic War 4: https://drive.google.com/file/d/1ARaBMDMtAHpVf_NgkcRelqAWtjImaAjp/view?usp=sharing
Epic War 5: https://drive.google.com/file/d/1oSvOx0yaRI1iBmLZW0wze_Mn15uPn286/view?usp=sharing
Epic War Saga: https://drive.google.com/file/d/1Bw1prLPLMs_uClwFEXxAlUbg05CaSWL5/view?usp=sharing
Guide to Supernova Player:
I'll put it forward to Nightfore, though they would probably be miscellaneous categories