I actually identify with your kids
My parents divorced when I was 11, my brother and I lived with my mum, and we could not be happier. Of course I missed my dad, but they brought out the worst parts of each other. It also helped that my dad was a very hands-on dad and I literally saw him about 4-5 times a week, and later on in my life I saw him every day. He became one of my best friends.They were happier apart and my brother and I were happier with them apart. People would always ask me if I wished they would get back together and my answer was always HELL NO.
What did affect us is when the divorce proceedings got a bit nasty - and we had to listen to both sides say this and that about each other. That took a toll and was probably the most difficult part of it all. So don't worry, the kids will be fine
Just wanted to throw my 2 cents in from the kids perspective!