Yeah, a GOP pickup of 10-13 seats almost guarantees that the Dems can’t gain enough seats back in 2016 to retake the Senate.
The Senate map does favor the Dems in 2016 as the GOP will have to defend twice as many Senate seats that year.
But I am focused on Tuesday. 2016 is light years away in political time. Much will depend on who the presidential candidates are and what coattails they have. I learned long ago to just take one election at a time. A lot can happen in between.