If shouldn't matter if Gabranth was not quite the man he was before. [Spoilers for the end of the game.]
That was not quite true.
The things that should matter most remained; the spies and streetears still reported in, Larsa still had a strong sword arm to defend him. Anything more should have been immaterial. A sword is a sword, after all.
But one sword arm is not the same as another, no matter how identical they may seem.