You know the drill, stick with it for a week and see if it comes good, you know he takes usually 2 weeks at least to stabilise on any routine, so give him that time. Then if things are still not right, at least you have some data to work with to make a change. It might be to keep nap length and BT the same but push nap later, it might be to cap nap further, it might be to drop the nap. These are all possibilities but you might also find he settles into that routine and you can leave it as is.
Hugs xx