They may be triggering a bit too often due to us testing them before release, and not reverting to a less frequent trigger.
Not 100% sure that's the case, but I'll check.
PS: I took note of all your suggestions for gunner voice lines. I can definitely get a few of them in there. Thanks!
PPS: You should try the Driller + Impact Axe if you enjoy axe puns.
Edit: We'll be lowering the frequency of the voice lines for the scout. The limit was set too low, and with the frequent use of it, it becomes too much. We'll change it soon, and see if it feels less annoying like that.