Actually I expected more from Luka Modric. His leadership role as Croatian team's captain is unquestionable but I expected more from him. He is fighting, returning to help defense, but offensively he should have give more. He produced far less of his famous passes than I expected. But the team plays much better with him playing than when he is benched. This will not only be the last World Cup but probably the last games that he plays for the national team. I don't think that he announced it yet but I think he will not play for the Croatian team after the World Cup. Luckily Croatia already found a replacement for him in the middle of the field - Lovro Majer. He is still young but he started to improve his skills after he left Dinamo Zagreb.
Luka still showed his best actually, but didn't meet good forwards to match him during this world cup, unlike in 2018 when Mandzukic and Rebic were around him. Regarding his age, yeah I think it could be his last game for national team. Majer is still far away to replace him, but let's see his improvement for next 4 years.
Yeah, I didn't mean that Majer will immediately replace Modric in the team. I just said that even after Modric leaves the national team, Croatia will still have a decent midfielder from who can be expected to improve his performance.