I have loved your product since 1978, and have wiled away many an hour creating. My favorite sets have always been those that can be used in castles. I have purchased all across the spectrum, but eventually retun to that theme.
Now I have children of my own, and my son especially is getting into building castles as well.
My hope is this. Hopefully you can see that there are innumerable people here who really appreciate the castle theme, so perhaps you could simply update the castle expander pack to include windows and doors specific to that theme.
The town had doors and windows for a while, and space had things like that as well, but though the arches are nice, we need something to fill them in.
If anyone from Lego actually reads this, thanks for taking the time.
A big fan, with two little fans.
(ps this isnt a criticism, only a request. )