There's no such thing as fixed position, or wanting Messi to stay constantly upfront. As a second striker, he needs to roam everywhere. Saying Messi disrupting the flow while dropping deep shows the poor knowledge in football. Then again, it's not like Messi was not involved in every goalscoring chances last season, he was everywhere and motivated to win the games. The monstrosity in his stats shows it all.
The main problem is asking the team aka "safe players" not to pass the ball to Messi all the goddamn time.
What is so hard to understand here?
Imagine Alena having the ball yesterday and running towards the box.
Napoli's players don't know whom will he pass.
He can pass to Dembele, Griezmann, Suarez.
So, the opponents have to mark everyone "equally" plus someone needs to close down Alena because he might actually try a shot.
So, Napoli had 4 options to mark in that action:
1. Alena dribbling and shooting
2. Dembele
3. Griezmann
4. Suarez
Now, remove Dembele and add Messi into this action.
Alena is running with the ball towards the box.
Will he shoot?
No, because he has to pass the ball to Messi.
Will he pass to Griezz or Suarez? No, because he has to pass it to Messi.
Even if Griezz gets the ball, will he shoot from that position? No, because he also then has to pass the ball to Messi.
So, roughly, when Alena had the ball yesterday, a next move was unpredictable for the defenders:
Something like:
1. 30% that he will play a through ball to Griezz on one flank
2. 30% that he will play a through ball to Dembele on the other flank
3. 25% that he will pass to Suarez in the middle
4. 15% that he will dribble and shoot by himself
When Messi is on a field, this action and probabilties are probably something like this:
1. 80% passing the ball to Messi at the edge of a box
2. 15% passing the ball to Griezmann
3. 4% passing the ball to Suarez
4. 1% that Alena will be actually allowed to dribble and shoot by himself and not passing to Messi and seniors
Now, if you were Napoli's defender, which option is tougher to predict and to mark?
Match 1 when Alena had 4 equal options?
Or a match 2 where EVERY BALL EVER WILL BE PASSED to Messi (with 80-90% certainty)?
Now, someone will reply: but Messi scored 50 goals.
True.
Messi scored 50 goals, but when he is on a field and when every ball needs to be passed to him, we are less predictable, less free flowing, with less off the ball movement (since, why bother to run since no one will pass the ball to you?).
With Messi, everyone knows where we will pass the ball.
Messi still manages to score inspite of that.
But, mostly in La liga.
In a CL, the opponents have more quality and IQ, and since our options are predictable, it is somewhat easy to mark and neutralize Messi (and our predictable actions) and we are dead after that. Just like Argentina.
During last preseason, we also played nicer without Messi, with lots of movement.
When Messi was injured in 2015/16, we also played more like a team because each player had more passing options.
Again, this is not against Messi. But it is how it is.
1. with Messi: you get less movement, more static formation. We usually play slowly and have to play against parked buses. All passes are aimed at Messi. And then Messi will eventually unlock defenses from 20 chances in that match.
2. without Messi: you get more movement, more teamplay, all players are more involved. We are more unpredictable (but less lethal in attack due to not having Messi, of course).
A final thing: yesterday we played the best pressing game in years and Napoli couldn't make 3 passes.
Everyone said: this is because of not playing Busi and Raki since they don't press.
But what IF our pressing game was awesome because we had 10 players who press?
And especially, we had 3 players in attack who press and the opponents were shut down in the beginning of their action?
When you have Messi, he don't press, and then we have only 2 attackers who press.
Then the opponents can avoid that press easily and move the ball towards our midfield where Busi and Raki again can't press and (or where Busi is dragged out of position, trying to press and fill Messi's void): we are soon dead and caught on counters.
But still, valid questions remain:
1. a quality of our pressing game with and without Messi in a team
2. a quality of our off the ball movement, teamplay and 1000s of different passing options with and without Messi
Again, imagine Frenkie running with the ball through the middle, and Messi comes towards him.
Will Frenkie be allowed to say: fuck off, move away, I don't need you here, run into space on the right or towards the box... Alba and Griezz are in better position, I will pass to them?
No.
Frenkie will be forced to pass to Messi in every action even though some other players are positioned better.
And that way, we are losing lots of fluidity, unpredictability, teamplay where 6-7-8 attacking players are equally involved in every action.