Maybe they want someone to stand at the front and shout about togetherness and club identity. Might get them a few results to the end of the season but tactically I'd say lamps is lacking and it's a puzzling move even if it is only into the end of the season. Personally I think that is them writing off this season.
Potter looked burned out and frustrated to me, absolutely the wrong club for him as it would be for many right now, with Yosemite Sam in charge.
But the most concerning thing for Chelsea fans has to be, what is the plan for the future? Is there a plan at all? Lots of outgoings needed, incomings may be harder with no CL and limits on spend, so they need someone to take the talent they have and get a tune out of them plus give them back an identity.
We all saw when pep came in that he wanted certain kinds of players. But he did it gradually and even now prefers a core small group to work with. Chelsea can't really do that now unless they're very clever in the transfer market. No shortage of talent there, but it's a Frankenstein of a team that will show up for pre season training with no idea how (or if)they're going to play or fit in.
Personally, when you look at the potential team on paper,I feel there only a good run away from being a big threat again. James and Cucurella / Chilwell as full backs, Enzo, Kante, Kovacic / Zakira in the middle, Felix, Sterling, Ziyech or Mudryk, Lukaku.... Big talent and big wages ... Still enough there for the right manager to get a tune out of them next season.