This is an interesting concept, I am going to observe mine how they do... I think it matters how the sun hits and how cold and fast the wind comes, for pretty fall color, you ought to plant some blueberries in front of the tree... they make quiet a show of oranges and reds.
You have so many great figs, why not do a 'braided' tree (pleaching) that is a show as they grow and mingle together. when fall comes, you select a few you like and have similar long growth, unearth them braid them and plant all together. and whoolah several varieties in one! when leaves fall, you will have an amazing eye catching tree.