2016 is a good year for the Dems to retake it back considering all the 2010 seats up for re-election.
True, true, but keep in mind that if Hillary has bad midterms like 2010, 2018 could see all of it undone and the GOP back in control. That really depends on how many seats flip in 2014 and 2016.
The trick for the GOP leadership from 2015 - 2017 is to
1.) block Obama's agenda and implement their own by putting through low-hanging fruit that Obama will cave to (ACA modifications, tax reform, Keystone XL, veteran's bill, etc.)
2.) control their Tea Party members (sacrifice the Ex-Im Bank, investigate a lot, beat up the EPA & Common Core)
3.) Give their 2016 candidate ammo ("Obama didn't want to compromise with us about stuff everyone supports!)" while not damaging them with embarrassing shenanigans (shutdowns, defaults, etc.)
Difficult, but not entirely impossible.
Someone seems to have forgotten that the filibuster is still in place when it comes to legislation.
McConnell could easily do away with it if he wanted. However, that won't be necessary just yet, because there are plenty of Blue Dog Democrats who want to be seen as moderate and centrist and are happy to vote with the GOP if Obama (who wants to still be seen as bipartisan) seems likely to sign something Congress passed.
Plenty of blue dogs? If the GOP takes the Senate, more likely than not Manchin and Donnelly will be the only ones left.