I said 4-3-1-2 is the way to go after summer.
I'll briefly explain why since you keep bringing it up
1) Everyone tries to press higher up these days. A 4-3-1-2 is the best system out there to a) make high pressing seem ineffective and thus b) means that you can hit the other team on the break with ease. c) You can still press them up high with your numbers and mobility from the middle and force the opposing team to start building up from their full backs which is the worst possible solution for any team out there because i) it leaves them with one of their worst passers having the ball, ii) in an isolated place with usually at best 2 choices - a winger and a central midfielder or center back and ocassionally a 3rd option in the keeper.
2) Having two lethal strikers when the aim is to keep the possession - which is why you have the volume of 3-4 people in the middle is better than having one. That also means that you have less defensive markings per attacker, meaning more open spaces that you can exploit. And with two scoring players up front, it means that at least one of them will have lots of chances.
3) The only major disadvantage of this formation is that it can be caught distracted by a slow build up as defensive switches may not always be extremely accurate. The good part is that most teams are trying to move the ball forward in a very fast manner, while in Serie A the quality to outplay a strong 4-3-1-2 is just not there.
4) We love these short passes but our distances are vast, so sometimes our midfield is either too high up or too deep, so we leave a shitload of empty space and then kick the ball to Perisic or Politano and expect them to play a 1-2, a quick pass or something, which tends to cause us to lose possession for no reason. Short passes requires a more compact system and a packed midfield gives you that.
5) Making the pitch appear wider by playing to the wings is beneficial only if the other team's strength lies in the middle. If your middle is superior, that's pretty much an irrelevant factor.
As I said, I'm a fan of the 4-2-3-1 but I don't see it working at Inter.
We do not play to Icardi's strengths, we do not play to our midfield's strengths, we do not have the wingers to pull it off apart from Perisic and we do not have the required defensive protection from the middile which leaves us exposed to teams that have a swift passing display.
We are 5 players short of having a great 4-2-3-1 system (LB, MC, AMC, RW and a DM and I'm not including the RB in Vrsaljko). On the other hand, we can manage with Asamoah as a left back in a 4-3-1-2 because he'll have more cover from the left sided MC, so we're only going to need an MC, an AM and a ST and at the same time we'll have to sell Perisic which is part of the plan. And he is the main reason we're playing a 4-2-3-1. If we sell him and look for another 4 wingers it's gonna be an insane move.
And I never suggested that our current team is built for a 4-3-1-2 because that'd be suicidal. I merely suggested that our summer mercato should look to strengthen our roster with the notion that we will start using that formation. I said that I feel our best formation currently is a 4-4-2 with Keita used as a forward in rotation with Lautaro.