The child care gets more difficult to organise, certainly.
I think most of the rest of it boils down to how flexible work can be and what support networks you have in place.
I always WFH on Fridays and do school drop off and pickups, which means I have managed to make some friends with the other mums who do help me out a lot at times. It's not so much that they do things for me but that they remind me of things and make sure I know about the coffee morning or night out that is happening which helps to keep me in the flow of things.
The children's lives do become more complex, but much of that involves being a taxi driver as a parent and so cna be done by hte nanny
Homework is done by the nanny here, but we always check it and go through it with them when we get home.
I think all of us have different balance points! Mine is to never miss anything that otehr parents will be at. So always at sports days, nativities, concerts, parent assemblies etc etc. That does put an enormous strain on things at work!
I know from your other posts and from our chat on the MN night out that you are not really enjoying work much at the moment, and I think that is the crux of it.
Things that you mind a bit, you can put to the back of your mind if work is enjoyable and absorbing. If work is awful, then those same things seem to have a much greater impact IME!
It is very hard work at times, and I see myself turning into a control freak at work and at home, as I'm terrified that if I let it all go for even a second, I'll never get it back under control again - EVER It means there are times when I don't like myself terribly much, which is a shame, as I used to think I was alright