Let's say that as you play with your itinerary and listen carefully to advice both here and from friends who've been to Sicily, you start to seriously consider taking one night from Venice at the beginning of the trip, and giving it to Sicily, for a total of 13 nights in Sicily instead of 12.
Spend that extra night in Ragusa (for a total of 4 nights to include much beach time).
Spend that extra night in Taormina (where you currently only have two nights?)
Hypothetically of course..... Thank you!