I think you're underestimating the Saints and Niners. Both teams are kinda banged up right now with some injuries to key players, but I wouldn't rule either out for a possible playoff run.
Also, the Cards could be a darkhorse team in the NFC this year. Kyler looks like he could be in the running for MVP so far and they have a lot of talent now on the offensive side of the ball.
I'll say this... I'm close to writing the 49ers off.
Bosa isn't coming back, they're all sorts of banged up at receiver (and they didn't have a lot of talent there to begin with), and they're pretty much a one-dimensional offense, even with Jimmy G in there. Jimmy G hasn't been playing well at all through 2 weeks, and I don't know that I would expect him to play a lot better when he returns 3-4 weeks from now from an ankle sprain.
And I'll put it more specifically... everybody is going to think they're still good, because they're going to start like 4-1 or 3-2. They play Giants, Eagles, Dolphins the next three weeks, two of which are at home. They're going to be favorites to win all 3, even without Jimmy G. And they may very well do it.
Their last 10 games of the season are among the most brutal in the league.
Rams 2x
Seahawks 2x
Cardinals
Saints
Packers
Patriots
Bills
Cowboys
Assuming they'll need 9-7 to make the playoffs (think they may even need 10 wins), they're going to probably win all of their next 3 games AND go .500 in that group, which is a very tall task from what I've seen from them the last two weeks. And while home-field advantages aren't what they used to be, 6 of those 10 games are on the road, including long road trips to Dallas, New England and New Orleans.