I’m thinking Massa could benefit from getting to another team. It’s a difficult position for him at Ferrari, because on the one hand, there’s no need for him to win races or run well in the Drivers’ Championship, as the team seems entirely content with Alonso pulling that off, on the other hand, it can’t just not matter where he finishes as the team would like to score the Constructors’ title, and they’re most likely going to miss out on that if things continue the way they do.
The tricky thing is that his results recently most likely won’t put him in a position where teams will cue up to hire him. All of the other top teams are filled up at the moment. A move to one of the backmarkers might not be advisable, though, because he’d either have to be as young as Kovalainen was when he went to what’s now Caterham, or face the realistic possibility that he might finish his career in that team at the back of the grid and be dropped at an opportunity the way Trulli was.
So what’s left, realistically, in my opinion, is the question of which ones of the midfield teams could benefit from exchanging one of their drivers for Massa. Which would be a circumstance where I’d point to teams like Sauber and Williams, which both have still pretty unexperienced drivers. That could be a situation where the team would appreciate more input from Felipe, and at the same time, his odds against his teammate would be significantly much better than competing against one of the quick champions, as things look with Alonso.
Maybe that kind of situation, combined with a lot of people basically having written him off already, could help him.
The big if behind this line of reasoning, of course, would be whether one of these teams would actually even want to part ways with one of their current drivers. I think with Sauber, it pretty much depends on how the question of Perez’s future is going to be solved. Williams, on the other hand, might be more inclined to look into promoting Bottas, rather than hiring someone from the outside.
Otherwise, I personally would consider migrating over to one of the Le Mans prototype series, as the cars are close to F1 tech and driveability, and generally, sportscars have been one of the major fallback options for drivers whose chances in F1 diminished.