This totally depends on your state. Your lawyer should know absolutely what is typical. I live in a new age, new-fangled blue state where the parties are free to craft their own plans in your situation, nevertheless it does seem like a lot of back and forth.
Also doesn't make much sense. What if you want to go away for a weekend, or he does. A full weekend alternating split would make more sense.
What if he had two days during the week and then you guys split Friday through Sunday every other week. Seems like you'd be at 50/50 with less disruption for the boys.
I'll be interested to see if he exercises this. Hard for me to believe since mine is apparently no longer interested in seeing his son (even for the whopping 2 hours per month he was) and appears to accept that daughter wants no part of him and can't be bothered to find out why or repair the relationship.
