Many (many) dads have done the 5-2-2-5 thing, and have turned out to like it.
Though common for tweens/teens to favor more of a straight up 7-7 thing.
Many cases have also gone with the:
1-day apart from either parent for each year old the child is.
Using that formula, even loosely, might mean switching the youngin's every 2-4 days-ish or something. Yes, it's more work for the parents too...but don't ever say out loud to Ex/other-attorney/judge/etc. that something is ever tough for you. It lights a fire under them.
Anyway, I digress...
Here's some "sample" parenting plans that the State of Arizona published (had commissioned by some social-worker-people). But to my knowledge, the document isn't considered proof in court or anything. But to me it has some really good options to help educate a dad on the possibilities.http://www.azcourts.gov/portals/31/pare ... elines.pdf