You can have the Ishgard feel and aesthetic. On your own house. And others are free to do with their houses as they please. If you didn't want to run the risk of a house not looking the way you wanted, then you should have chosen a plot that wasn't facing others. Because people are going to make their FC house or their personal home into something comfortable and that brings them joy.

I personally love the Paissa and Carbuncle houses. I had a Paissa down the street from my personal for a long time and a Carbuncle across the way. I was very sad when they both moved.