I can understand why you enjoy life more now, you aren't working out of the home, your most stressful decision is what's for tea (I don't mean that as sarcastically as it sounds), you have more time for the children for yourself and are in a better mood when your husband gets in from work.
I am not sure this really has much to do with the dynamics in the relationship, your husband doesn't sound like he cares much which way round it all is and if you wanted to work, he'd be happy with that too. He doesn't sound like he would veto anything or indeed encourage anything, he sounds like he goes along with what you want, including you controlling all the finances (which is hardly Surrendered Wife territory, quite the opposite).
So its really about having the luxury to downsize your life and step out of the craziness that can be two parents full-time working and caring for children and doing the housework which can be too much.
I would love to step out- for about a year, but then back in again. I have supported my husband to step back (not out) occasionally, when he has less work.
I don't think there's anything radical in this set-up or indeed very traditional. If you announced you wanted to restart work tomorrow, sounds like you could and your husband would support you, equally he's happy if you stay home and do the housework and cook the dinner if that's what you want to do- I'd quite like a housekeeper and if you can afford to do this, I don't see the issue.
Whether it is satisfying for you personally in the longer term is another issue, sounds like it won't be which is why you are looking to retrain.