We probably learned all that Caracella had to give outside of whatever new stuff he comes up with
The "new stuff" is kinda important when you need to completely change your focus from an entirely defensive midfield to one which requires a much greater balance of attack and defense.
We shouldn't make out like he's a god, anyway. Also my mate plays (or has played a few times) basketball against him and said he is an absolute sh*t bloke haha...
I have a very clear memory of the stark difference between how our midfield, ball movement and overall game plan worked before Caracella came in and what happened after he did. Do your mate's opinions about him as a basketball opponent change that?
Rhetorical question.
Also, last year wasn't Kingsley in charge of the midfield and Caracella doing something else?
Not being directly in charge of a department doesn't mean you have zero input, especially when things aren't working.
The amount of times opposition midfielders have had way too much space in the centre and at clearances, the amount of times they can turn a hitout won by either ruck into a clean clearance, contrasted with what we've managed - the diametric opposite - makes it pretty obvious that our systems are not working ATM.
I'm sure that's something Caracella may have had some useful thoughts about.