That 6-12 record against Detroit isn't helping matters. That's 12-24 against two teams in your own division.
Actually what happens now (i.e next two weeks) WILL impact next season. Another blown postseason spot will make it even more tougher to get the fan base, already angry, to buy tickets. That impacts the payroll Hahn (if he's named G.M.) will have to work with.
Plus if the Sox do make the postseason additional home games (which I assume will be sold out) will generate additional revenue that might be applied to next year's payroll. Making the playoffs this year if I remember right, guarantees the Sox at least two home games.
Then you have the additional benefit of some fans stepping up and getting season tickets for next year based on the results this year.
I get what you are trying to say but to just say there's no impact at all on next year is wrong.