- The ignition delay is too long. This is by far the most crippling defect of the Hellfire. It is why it's completely impossible (no, not just difficult, impossible) to land it against moving targets in close-range. It is why it is so easy to just take cover every time someone fires them off. It makes it completely useless against any skilled player. It makes it COMPLETELY useless against any A-class, no matter what situation they're in. It is a terrible, awful defect that makes it all but unusable in 75% of actual combat situations, and it really should be fixed, if not removed outright.
- The spread is incredibly harsh at closer ranges. This is what results in such travesties as half your rockets striking the ground when you're firing uphill. Flavor-wise, it's very cool to see a huge spread of rockets coalesce into one giant mass of death when firing at long range. It's not so cool to see half of them miss after painstakingly timing a shot half a second ahead of the target (because that's how far you have to go with how long the ignition delay is).
- The weapon is highly susceptible to protection from cover. Of all the secondaries, it is by far the worst in this area. TOWs can do damage around corners thanks to mid-air detonations. The SABOT has projectiles that travel fast enough to land before a target can dodge around a corner. Grenade launcher... well, I don't need to explain that one. Hellfires, meanwhile, have the massive delay AND the warning signal in addition to the travel time inherent in the rockets themselves which gives the target plenty of time to find cover before they land - and even if there isn't any cover, they can just walk in one direction and then dodge in the opposite direction to cause them to go wide.
Funny thing is, most of this could be avoided if they just didn't have that gawd-awful ignition delay. As it is, any player that's paying any attention at all has far too easy a time dodging them and trying to land any hits with the thing is an exercise in constant frustration. They might even need a boost in travel time so players don't get so much advance warning before they land (though this also makes them conveniently easier to dodge at range since their agility is lower).
At any rate, I'm 100% certain something needs to be done to make them less useless, because only people who really, REALLY like the flavor of a lock-on weapon are going to be using this thing when players figure out how to beat it.