Sounds like a winner to me. You may be hauling monster vegetables out of there by July with a forklift with all that compost. But that's ok. Be ready with the canning kettle and sterile jars. Cheryl

I think you'll have a fabulous garden.

People think clay is bad. Clay is bad if you have too much of it, but a little clay is a good thing---better than none. Or so I've read.

("Or so I've read" looks so strange to me right now.)

Sounds like you did more than was needed. I would perhaps go 8 or 12" higher for my veggies -- tomatoes, peppers, lettuce, spinach, onions, carrots.

Instead of raising the height of some areas, I choose to add large amounts of compost into the soil over a number of years. The grayish clay soil is decent now.