I only focused on Shelton a few times but you can say overall he did his job because he did not stand out in a negative way. Coming into a game cold like that is tough. And should he need to start vs. ARZ he'll be more prepared having had starters' snaps all week. So that's good..
I think the best thing I saw Sunday was the hard running identity that Michel gave them. Add that they used Noteboom successful a handful of times as a 6th OL and I think it might help the light come on for what the Rams need to do more of. A more physical run game, more play action passing (I think Jourdan said they ran PA like 12 times vs. their average of 5), etc. Not a seismic shift in any way but maybe- just maybe- it can give them a similar boost like in 2018 when CJ Anderson joined them down the stretch.
I like Henderson and, when healthy, he should absolutely be part of the offense. But Monday Night and perhaps beyond Michel should get a lot of work. Note that Arizona is 31st vs. the run (4.7 YPC) but 5th in opposing passer rating.