Re. tied weaves, mostly Summer and Winter, and "Syrie", I looked at a small collection of samples I did for other projects yesterday.
1) Patterns are expressed by wefts.
2) I don't have to use patterns, i.e. I can have have big areas of backgrounds, (i.e. walls,) where Syria-inspired design will appear; weft can be seen, of course, but depending on the weft and warp yarn/s, size balance, and the pattern, they can be inconspicuous.
EDIT: It's now Feb 2020 and I'm rereading all posts relating to "Syrie" and I don't understand what I meant by inconspicuous. I know I didn't mean just showing blocks of weft floats, but this is what I'm thinking now.
3) I can use most of the shafts for the background and reserve just one for the pattern/windows if the windows are to appear in unison horizontally. The height of the windows can vary with the treadling. If I want three sets of windows, where the third is a composite of two sets, I only need two pattern shafts.
I'll stop here today; more in a couple of days.