Hi there and welcome to BW!
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I'm sorry that your DH is encouraging you to CIO, esp as he doesn't do much of the work of putting your DS down. I'm assuming you know that Tracy was firmly against CIO and we don't condone it any way here. I'd be happy to give you some links on why it is not effective and how it can cause stress and loss of trust in your LO if you think that would help your DH see why it's not the best way.
As for the NWs, (((hugs))). It's rough to be awake that often at night. There are a couple things I think could be contributing. First of all is the shh/pat prop. It's great that shh/pat works for you, but obviously you don't want to have to so it every time he wakes. I'd start to very gradually reduce it, so that eventually your DS can calm on his own. What you want to do is stop the shh/pat once he calms and just keep a hand on him while he falls asleep. If he gets upset again, you can shh/pat til calm again, but then stop and just keep your hand on him. After a few days, you will stop a bit earlier, when you feel like he is starting to calm down. And continue this process until you can put him down without having to shh/pat much at all. It can take awhile as it is quite gradual, but it does work. A key is to use your voice to help him settle as well (a sleepy phrase that you can use forever, really) and that will help him focus on something else other than just the shh/pat.
As for your routine, it looks like you're pretty close to a really good one. I wonder if you push the second A time out to a full 2hr (nap at 1pm), he might start sleeping through it better for you. Another thought I had is that he may be getting hungry earlier in the later afternoon and that's the reason for less sleep and more fussiness. Not all EBF babies make a full 4hr EASY until they start on solids. So, you may want to try feeding a little earlier in the afternoon, around 3-3.5hr or cluster feed before or after the CN and then before bed. Do you think he's hungry at all?