Nate Cohn believes that filibuster reform could hurt Democrats in the near-term:
For now, the biggest partisan items on the two major-party platforms lie on the GOP side of the ledger, and that seems likely to represent the new norm. Republicans are unified around a series of large and controversial measures that possess little Democratic support, like reshaping the tax code and reducing entitlement programs. Persistent budget deficits, an aging population, and rising health care costs will make it more difficult for Democrats to propose expensive new programs, while ensuring sustained GOP pressure on entitlement programs. And after Bush's push for Social Security privatization or the Paul Ryan budget, there shouldn't be much question about whether Republicans are likely to act on these issues if the opportunity arises. To the extent that Democratic support for filibuster reform is motivated by the prospect of partisan gain, perhaps Democrats should think twice before disarming the filibuster. And perhaps Republicans should revisit their opposition to reforming it.
Ezra has a different view:
Senate Republicans have thrown away two prime opportunities to retake control of the chamber (2013 and 2012), and there’s a dawning sense among the GOP that the demographics might be tilted against them for the foreseeable future. If that’s true, then McConnell is wise to fight this out as if he’ll be in the minority forever, rather than tempering his concern as minority leader with his incentives as a future majority leader. A world in which McConnell’s only tool will be obstruction is a world in which it’s a real problem if Senate Democrats feel empowered to change the rules with 51 votes. Sure, the reforms Reid’s proposing now are modest, but what about the reforms that he’ll propose three years from now?
Hertzberg's case for killing the filibuster is here.
The Dish 