Considering how AC Milan dominated in the match with Dortmund and created many opportunities in middle of the week, Verona looks like not to be an opponent that can constrain attacking power of AC Milan. They will even face with bigger pressure from AC Milan as the host actually need three points after some bad matches in Serie A. AC Milan players hopefully learned something from their inaccurate shots in Champions League match with Dortmund.
Playing a Champions League match and a league match are different things. When they play the Champions League, they prepare for that match with full concentration, they care more about that match. Because only 6 matches are played there in the group stage and there is no compensation for the mistakes made. In league matches, there is compensation for mistakes, they play 38 matches throughout the season. Lost points can be compensated.
Since they put in a lot of effort in the CL match, they may come into this match tired, rotate too much, and not be able to focus much. Although Hellas Verona is not a team of Milan's quality, they will play to get points knowing these. Milan needs to pay attention and care about the match. Otherwise, it's difficult for them to win.
I disagree with what you said about the 38 matches with compensation. A team can't rule out competition even with a huge number of matches each season. If they think that, then they will never progress.
It may be true at first glance, but if we look further, it is a mistake that should be avoided. It's also worth remembering that they're in the Champions League because of the competition in the domestic league, in this case Serie A. If they think they are compensating for the mistakes they made in the domestic league with a large number of matches it is a mistake they are making,
I agree 100% with what you said. This idea that players can accelerate and decelerate their performance from game to game with a snap of the fingers is bullshit. The best teams are the teams that play with 110% concentration every single game. There is a difference between concentration and intensity. They might reduce intensity when it is possible in order to give their body less of a burden during a game that they are controlling by a large margin, but playing some games on high concentration and some on lower concentration isn't a thing that works. Manchester City is on full steam 99% of the games. AC Milan is a top team that wants to win every single game no matter what the competition is. It is true that there are more prestigious games in the Champions League in terms of the quality of the teams participating, but the players want to win the Serie A with no less desire.