I think the coaching staff was always eventually going to be turned over. McVay has been honest about his lack of experience - well after three seasons, he's been exposed to everything from situational coaching decisions, crazy travel schedules and even the Super Bowl.
In a way he wasn't building *his* staff in the beginning. And he definitely wasn't building *his* team either - he inherited Goff, Gurley, Saffold, Donald, Ogletree, Littleton, Havenstein, Higbee, Quinn, TruJo, GZ, Hekker, and I'm sure I missed a few.
Then, for Wade, he turned over the entire defense almost twice over.
The only thing he did for himself was Watkins (then Cooks), Woods, Kupp, Everett, Reynolds and Whitworth, and then Henderson. It should be encouraging that every player he has chosen has been outstanding on offense except for Henderson, who still has time to get there (not counting Kelly because that was a late draft pick).
He got burned several times last year:
First, Wade's handpicked defense was trash - in weeks 4 and 5 the offense played well enough to earn a 5-0 record, but because of the defense, we were 3-2. So McVay approves to trade TWO FIRST ROUND PICKS to once again upgrade Wade's defense, only to see them get wrecked a few more times.
Second, after letting Bones make roster decisions based on special teams (drafting Scott and keeping Jojo on the roster), and having a highly paid punter, the ST unit was a failure last season.
Third, and this could have been his own mistake obviously, but extending Gurley was a huge mistake. Whether Snead pushed for that or McVay, we'll never know.
On top of all that, Talib has said after the fact that the Rams got complacent - if that's true, we needed some serious turnover.
And now, McVay is faced with an impossible task: build a contender with no cap space that's losing several starters and already needed some upgrades. So what to do? Here's what I think he's doing:
-Build a coaching staff that after a year of experience, will be ready to compete by 2021
-Build up comp picks by letting these guys walk so that next year's draft can be productive
-Stop trading first round picks
-Use 2020 to make decisions on Cooks and Gurley (if not traded), Noteboom/Allen/Evans/Havenstein/Edwards and SJD/Gaines/Smart/Kiser/Obo/Polite/Ebukam
That could very well be an 8-8 team next year, or maybe worse - or, if a few of those guys are better than we currently think, maybe we win the NFC West - but from a longterm roster building perspective, 2020 would be a year to figure out how to move forward - obviously we'll still try to win - but this would be a conversation between the brass where they say "hey, we might be worse next year while we kind of re-build on the fly".