Like you said, players like Rodrygo requires much playing time in any team they are in order to excel. On the part of Alonso changing situations in the team to create that quality Real Madrid are known for, it's going to take some time as he can't get things right just immediately. The only position in real Madrid squad is the attacking positions. Next season I probably not be expecting the midfield and defensive positions to be as strong as to give them a competitive team anywhere even though they get to buy new players.
Basically, they have a good team, but it's not well coordinated yet. In my opinion, defense is their main problem they have fast players in attack, but the midfield and defense aren’t what they used to be. It will be a big challenge for Alonso,
but if Mbappe is in top form like he should be, and Vini as well, there won’t be any problems.
As much as that there is a challenge with the midfield and defence of the team does makes the attack ineffective as it should be, because while they get so creative in the front to get goals, every goals they get cancelled easily get cancelled as the opponent beats their midfield and defence to put back the scores on levels. But when a team's all round good in all departments then every goal scored is secured for a victory.