I'd probably take a minute to think of these game play mechanics from the eyes of a new player. There is no doubt that we have a dwindling community. We had a surge of new players during the last steam sale, only to have that horribly derailed by the fucked up valor patch. In my opinion, we now stand worse as a population than before the steam sale, sadly enough. I think that a new player who gets killed in melee, at least, in the back of their mind, thinks they had a chance, or will one day have a chance to kill that player once they have the stats to do it. However, a new player getting shot to shreds by an HA near his spawn, especially because they are targeted first due to their low armor, is going to find that even more discouraging to continuing playing this mod. Keep in mind, he may not even know where its coming from. Worse yet, he's going to have to sit out the rest of the round as spectator, which is almost guaranteed to run long because the HA will probably be the last one alive at the end.
This is an issue outside of the balance issues. Although I would tend to agree that both are big, outstanding issues that need resolution. There's no question about it, HA is bad for server population and for number of returning players.