his recent efforts (and hopefully continued) may not make you feel any less worn down for a while. once they've been consistent, over a period of time ( that time is unique to everyone) you will probably start to feel less worn down.
also, it can feel heavy once they start to step up because you can start to let your guard down.. which in itself puts a whole 'nother set of emotions in place. take one away, replace with 9 ..
"normal" is something you get to make, and it takes time to tweak and bend into what you want/need it to be. it's not a straight road. it might feel weird, or taxing or exhausting because it's a work in progress and the both of you are still trying to learn the healthy way of doing it as a couple that has experienced one of the biggest blows a relationship can take.
life happens. kids get cranky, bills pile up, cars break down. it all adds to the already emotional load you're carrying. enjoy those moments when things are good.