Yes, but the characters are degrading to the point of, well, breaking.
The first scene of Thirty-Eight Snub shows Walt buying the gun for "protection," or rather, to just outright murder Gus. When Jesse shot Tuco, and they had the opportunity to just get rid of him, Walt just says, "let him bleed." Now Walt is willing to kill even relatively harmless people to save his own life, without remorse, and he's got what, at least two more years to live himself?
What was that quote from the first season episode "...And the Bag's in the River"?
"The soul? There's nothing but chemistry here..."
Walt keeps Jesse from killing or most likely getting killed by those two gangsters in Half Measures. Those two were murderers. And then Jesse, to return the favor and save Walt's life, has to kill poor Gale. Would it have been better for Jesse to have been killed initially, than now having to live with what he has done?
This season has the opportunity and possibility of taking everything to its most extreme.