I think it's pretty clear that the games vs Inter were key to advancing in the CL in that season. The team failed that year, but last year the club came back and got very close to a CL semifinal and potentially a final.
You need experience to go far in CL, and the team improved on this under Xavi no doubt. Last season it was the best CL run since 2019 by a distance.
I think now Flick can get us an extra step further. He seems up for it. All I see from Flick so far are great signs that he can build more over what Xavi did in his 2 full seasons. It is all about continuing the path forward.
At the moment Xavi got signed, the team was horrible in CL, trashed by Benfica, and even more horrible domestically, at the middle of the pack, on 9th place in La Liga. The situation now is much much improved.
Flick took over a team that shortly before was crowned champions of Spain, and CL quarterfinalists, one step into the semis before an idiotic red card. It's night and day.
It seems Laporta is doing a very good job. Appointed and sacked Xavi at the right moment, and if he got the successor spot on in Flick, this team is going places. If money come back... sky is the limit.