There is also an option that we don't need MSN, but only 1 or 2 star players and a more balanced team around them.
I would agree with you if MSN had airs and graces, but this isn't the case. Everyone saw lately that Neymar is a fighter and works very hard off the ball. You can say the same about Suárez. Messi is a different topic. We all know that he needs breaks during games to get the most out of him. No problem about that. One could argue that these players don't work together, but this isn't the case. It is true that their roles need to change. Messi is not a winger anymore or in other words: we lack of creating midfielders so he has to do the job.
Give these 3 a good midfield and they will be lethal again. I mean imagine them playing with the likes of Kroos and Modric. Just one spot in our midfield is covered perfect and this is Busquets. Sure, Iniesta is great, but we can't expect him to pull the chestnuts out of the fire. Rakitic is a hard worker and there was a time when we desperately needed this kind of player, but now we are lacking creativity and Rakitic is not the one to serve that.
The only thing in that MSN could hurt us is their price tag. I agree with you if you meant this. We just need to get rid of overpayed players like Arda. I don't know what he earns, but I can tell you surely that he isn't worth the money. Robert/new coach must stop paying 35M for such players.