I'm not a fan of blended soups.
I DO use frozen veggies in my regular soups regularly.
When making a soup, I usually use fresh veggies, frozen veggies, and dehydrated veggies all together. Once everything has simmered for a while, you can't tell which were fresh and which were frozen.
**TIP: If my frozen veggies have been in the freezer for a while, I'll put them frozen into a bowl, rinse them, soak them, and rinse again, until they are thawed out and the "freezer flavor" has mostly left them.
***TIP2: Soups are a great way to dispose of vegetables that have gotten freezer burn... Just follow the direction above. Before adding them to soup, taste one of the thawed frozen veg things and make sure that it doesn't taste gross... Some things just have to be trashed.
Give thanks to Mother Earth for Her greatest gift...
For without it, we would be lost.