Berson will be around next season, and will be a bigger part of the squad.
It's a big big jump from Ligue 1, and not all players are able to make the jump at the pace Drogba has, or that Sonny Anderson (God) did when moving to Barca from ASM (before coming back and banging in the goals for my beloved OL). L1 has nurtured some tremendous talent in its time... but it does more often that not takes time to show itself. If DOL doesn't know that, and can't see the talent in Berson, he's frankly not worth his salt.