You have many more important arguments to make against the cathedral's form and structure if it may not be changed, but rather preserved and restored only to it

You have many more important arguments to make against the cathedral's form and structure if it may not be changed, but rather preserved and restored only to its original character. What century does the cathedral belong to, by the way? 12th? 13th? 14th? 19th? ... There are several centuries of alterations you should revert before you even begin to object to the windows. And you can hardly expect your claim to be taken seriously that the windows will need replacing in 30 years. It's inconceivable that anyone associated with this singular project would make so foolish and transient an investment right now.