We made this just as the recipe stated. We liked it but didn't love it and our kids (8 & 3) didn't much care for it except for the shrimp (and the asparagus for the older one). I loved how quick and easy it was to make, especially with putting everything in one pot to cook. I was happy with the way the veggies were cooked but felt the sauce needs 'tweaking' a bit. Just a bit - sour or something. Will look at all of the suggestions again.
I think I would saute the garlic - odd that it was uncooked. I would also add a bit less lemon juice. We didn't find it salty. I would like to also add a bit of grilled chicken to make it more filling, but that would also add to the amount of time. Like the idea of a bit of paprika and cayenne pepper to add a bit of zing to it.