I think <50 games is too little to evaluate a coaching staff, particularly a recently successful one, but let's just say "their removal is on my radar at this point".
As far as the team goes, I think the biggest need that won't fix itself is the bullpen. With the offense, their bizarre production splits make me believe they'll right themselves at some point, at least partially. The rotation has been up and down but I think there's enough there to recover, if not be good.
But the bullpen... Duffey simply isn't the same. Robles was always a risk and seems to be roughly what I expected him to be, a decent 4th-ish option in the pen. Colome will fix himself, I think, but he's still a big risk.
That leaves Rogers as the one guy who doesn't make me sweat when he takes the mound.
And one reliable guy is about 20% of the bullpen you need in the modern game.