What are the other options though? Lucho sees him as a DM , so him fighting for the CM spot for the first team next year is out of the window. In the DM spot he has Busquets and Masch in front of him. And him playing another year under Eusebio doesn't seem like a good idea either. So loaning him out seems like the only good idea IF lucho stays here another season.
This line of thinking is the problem.
First of all, Mascherano is not a DM for us and the fact that nobody can actually see this shows the fanbase in general is in pure denial. What sense does it make for our first choice CB to be our backup CDM? There's a reason we had Keita, and Song, after all. Second of all, Busquets does not need to play every game, especially with his form fluctuating the way it is now (Although, to be fair, as with all our midfielders, his poor form is almost entirely on Lucho).
As far as Mascherano goes, as I already said, he is our first choice CB. In all but the most rare situations (I believe this is hist first season ever playing in midfield more than once in a season) that is where he will play. On top of that, he's fucking 31 years old by the end of this season. What's the point in blocking a midfield talent set to become the best midfielder to emerge from La Masia since Xavi himself in favor of a 31 year old who doesn't even play the position with us?
Then, there's also the simple fact that there is no way in hell that Samper plays out his entire career as a DM. I can almost guarantee you that if we dip our faces in acid and loan him to Sevilla Emery will utilize him as a CM and watch him thrive, the way we should have shortly after Samper's promotion to Barca B. Lucho refusing to give him the opportunity to evolve as a player (Mind you, the shift from CDM to CM is the EXACT change Xavi went through as a youngster) does not give him a valid reason to just offload our single most promising youngster.
I mean, honestly. When he got rid of Deulofeu people started shitting all over the kid for all his various flaws. What are the flaws with Adama? What are the flaws with Suarez? What are the flaws with SAMPER? Not a single young player that we've sent on loan has come back to have success at the club. It is the kiss of death. Rafinha may quite possibly be the one to break that but he's a midfielder, and unfortunately for him Lucho isn't a very big fan of midfields.
You Lucho crusaders may be tying your nuts in knots to maintain your rampant apologetics but every day and every game it becomes clearer and clearer that he's not the man for the job. What will you be saying when we don't win any trophies this season and Barty boy gives him the sack? Will you be cursing the high heavens that Samper and Adama won't be going out on loan? Don't kid yourselves.