Sorry it was another bad night
Honestly, without seeing what's happening in the day it's really hard for us to comment. Day sleep affects night sleep and vice versa. It is important to understand however that EASY is not, and was never meant to be a schedule. Learning to read your LOs cues and aiming for an EAS pattern where you can (although some EASAEAS is normal when getting started) is what you should be focussing on at this stage.
If naps in the pram are easier from a purely logistical point of view, that's fine, but I wouldn't rock the pram. Treat it like a bed, put the brakes on, and stick with shh pat which is easier to wean.
Naps shouldn't be 'enforced' to the point that neither you nor your wife is enjoying your baby, I think that's what is being referred to when people say to enjoy the playtime. But of course babies need sleep and will be cranky without it. It's just it's easy to become sleep-obsessed and before you know it you've missed your baby being a baby
. If it's been a bad day, just put LO in the pram or carrier and get out and do something nice for yourselves. There is a 'Y' in EASY for a reason
It's up to you about blackouts. Can only speak from experience (my own and that of many parents on this forum) that LOs sleep much better without distraction and stimulation. Although the sleep book you mentioned is one of the more famous for recommending sleep should be in the dark, it is by no means the only one. My personal view is that for babies, nap times are every bit as important and 'proper sleep' as nights - so why wouldn't I do everything I can to make the conditions for sleep optimal? Like I said though, it's up to you.
Yes, if he is napping better that may have a knock on effect on nights. Seeing a record of a couple of days would really help though. Can your wife just note down wake and sleep times? Don't worry about when LO eats etc, just an outline of what's happening would help us to help you much better.
Are you currently patting/rocking until LO is fully asleep? It may be time to start stopping a little sooner with the patting, perhaps when LO is drowsy/almost asleep and see if he can do the last bit for himself?