Looks real yummy! I would of used less pasta and whole wheat. Plus either no mayo or less and a good olive oil. I add frozen peas in mine, and add them to my pasta water the last 5 minutes or so. It's all what you like. Such as adding tomatoes, cucumbers, feta cheese etc.
Oh I forgot to mention this. I have a recipe were it says, no need to drain your tuna fish if it comes in olive oil.