Base Extensions for more room

Basically, this is an extension to give more room to place defenses at certain levels of town halls. These numbers are all extension added onto the previous extension. So here is the extension space given to different TH levels:
TH 1: No extension
TH 2: 1 tile each side
TH 3: 2 tile each side
TH 4: No extension or 1 tile each side, whichever
TH 5: 1 or 2 tiles each side, whichever
TH 6: 2 tile each side
TH 7: 1 tile each side
TH 8: 1 tile each side
TH 9: 2 tile North and South sides
TH 10: 2 tile West and East sides
Hope you like this idea.

You have to keep it a perfect square that’s for sure....

But i know it's been discussed earlier (th11 discussions) to make the map bigger.

But the map has to be the same for all players, regardless of town hall levels.

So it’s basically not a good idea...