one of my absolute FAVORITE things that EQ does is:
change block size at the click of a button...
how many times have you seen a block you like in a magazine or book but the block is, for instance, 8" and you want 10 or 12, or conversely, it's 12 and you want 8....
just set the block size, pick the block, click print and wa-la!
another favorite thing is playing with colors, fabrics, sashings, etc