Lautaro has to remain as a captain but as a second choice I'd probably give it to Dimarco or even Hakan. Meanwhile I rate both Bastoni and Barella as fantastic players, I think they aren't captain material and probably will never be. Barella doesn't strike me as a leader or authoritative guy, whilst Bastoni is way too mute for a captain.
I've always thought Handa was similar as well. The guy has great authority and is respected but he wasn't a leader IMO.
Ever since JZ era, we've struggled to find a proper captain. Also blame it on plenty of changes in the team in overall (coaches, players and ect).