Overall, no. While I'm certainly not someone who thinks every manager has to be a long-term one, by luck rather than by judgment, we've ended up in a good position with regards to a new manager that might stick around. Ten Hag and Pochettino are both available this coming summer, are both (reportedly) interested in the post and are both managers who could give us a good long stint if succesful. Since SAF left, we've managed to always be recruiting at just the wrong time, leaving us with second-tier options. This is the first time in a while that hasn't been the case. I think it would be daft to pass up on one of those two.
We also need to move away from the "Manager is God" model. We've made tentative moves in that direction, but getting Rangnick as the voice in the ear of our DoF could really make things change at the club. If we end up with Rangnick both managing the first team and running the upper management, then we're just making a rod for our own back long term. With a guy who's 63, that isn't a sensible option. It means that, when he leaves, we go back to square one.
Given he'll be working for us in any case, it gives us a sort of safety net. If our new manager doesn't work out we have a great option working away in the background. But overall I think we get a double injection of quality if we keep Rangnick around plus a new manager, and in a way that solves some of our structural failings.
Of course if the guy goes and straight wins the treble or whatever, then it might become impossible not to keep him on. But more points than the league leaders over a partial season feels like an Arsenal kind of trophy, so for me that wouldn't be enough.
