Thanks for all the encouragement and ideas. I think it's growing on me. Maybe I will keep going. I'll post the final whenever it gets done. (I may store the blocks for awhile. Too many other irons in the fire.)
I thought with all the scraps I had that I could cut out more of the 3" 4-patches, but as you can see from the second pic I posted, the scraps are just not quite big enough. I think I'll try cutting some border pieces that are rows of the patchwork, so I don't have to do quite so much piecing back together of fussy cut squares.