I am not sure in which period of time you're claiming those improvements (so I'm not disagreeing), but my short answer is since Bruno came here, we've improved our game slightly. We've improved massively on players, that's why you see Varane clearing headers that could cause Lindelof a problem, and on the other end Ronaldo/Greenwood is finishing chances that last season Martial and Rashford would've missed. That's the improvement I see. But in terms of team play, we still move the ball slow, players receiving the pass need to take a good look around to see what options they have and quite often they don't have any, and our midfield still seems to be functional only if McTominay and Fred play there.
A lot of people seem to get very nervous about this coaching issue because we're getting good results, but I also see we've been quite lucky recently and unfortunately I don't expect that to be a trend. Same as last year we had some bad luck with finishing, although we played some good stuff too and created good chances. That's why I don't see much improvement in terms of general play, we're pretty much on the same level as we were end of 19/20 and starting 20/21.
This squad of players has great potential which we're not using correctly due to our coaching limitations. This should not be an issue against West Hams of the world, but my prediction is we'll struggle massively against any top team. Right now we seem to struggle quite a bit against any team that isn't either playing careless football or totally giving up on pressing our midfield.