I do many FG as well and most of mine are 2 x 4 (2.5 x 4.5 unfinished)finished size. I also use the method of sewing 2 .5" square diagonally through the middle to either side of a 2.5 x 4.5 rectangle. The resulting triangle that is lopped off I always sew the two pieces together and from that I can get a 1.75 or 1.5 HST. There are many full size quilt block patterns that use this size of HST. Tree of Life, Bears Paw, Maple Leaf, Delectable Mountains, Ocean waves, just to name a few are all very nice quilt patterns that use many small HST and most of these look good done scrappy. So you are most definitely not limited to miniatures with the waste from your FG.