I disagree. Put yourself in Ben's shoes: You died. You came back, did some terrible things, and are trying to make up for it. For the first time, you see things from Kaine's point of view. Kaine has been carrying on the legacy, and using the name proudly to do good things. Last time you and Kaine talked, he was doing terrible things.
Why strip him of the thing that's causing him to do the most good?
Also, Pav, if you're reading this, let's pitch Marvel on a Kaine series.