Thank You for posting. When you plant a fig tree in a pot the flavor and quality of the fruit becomes unpredictable from one year to the next depending not only on the elements but also on the way it is handled.
As an example my Celeste which was in a pot yielded some super sweet figs and was one of my most productive figs in pot for two years in row. However, this summer I do not recall picking one good fig off of it. Some of the fruits looked like your Sicilian and had no flavor.
I'm willing to bet that that same Sicilian would taste totally different in another location or under different conditions. Don't give up on those figs. It is a matter of what you feed them and how you handle them. As you know input = output.
I would look for an in ground tree that could do well in your area. In the end,  it might beat all your trees in pots when it comes to flavor as it ages and becomes fully adapted to its environment, but there are some varieties that no matter what you do are not adapted to your local conditions and will never taste great.