Ok, if things are like that (and they sound great, TBH) and IIWY I'd feed at 5.
It's still ok at his age to want a NF besides the DF, my DS was the same and really, if it gives you a couple more hours of sleep with easy settling after the feed then why not?
Yes, there is the morning feed issue. Don't worry about it. You can offer him a bottle when he wakes up, if he will be hungry he will take some and if not, not. If he didn't take any or not enough in the morning feed and you don't want to throw your day away in regards to feeding, you can offer him another bottle in the middle of the A, even 30min before his nap and then you just go back to your EASY.