It's not exactly useless just because it's neutral. You could use it to check people who swap, but the damage and speed is too low for it to be feared, so it is useless in this case. Not to mention a hybrid build would suck because, since offensive traps are useless, you're losing out on HP or crit for the singular ability to check people who are smart enough to swap with, at most, 10k FA spam. As it is, FA is useless but I doubt a buff (unless it was ginormous, which could break the class) to it would make people switch over to hybrid build (full FA build is suicide obviously) or make any real difference in PvP. Maybe if offensive traps and traps in general were worked on (the ability to stack fixed, proper nerfs/buffs, etc) along with FA then it would be worth it to go hybrid, but again that could break the class by giving them too many options. But I doubt an FA buff by itself would change much (Pneuma will still be a brick wall for Snipers), if anything. If it was stronger than it is and able to be enchanted then it could be used to deal with Ninja more easily because FA doesn't affect CSS, but beyond that I think full damage builds will still outdo them.
tl;dr I would be indifferent to this, since I don't think an FA buff would do much... But for the sake of diversity, +1.
As for the increase, if it was to be buffed then it would have to be a pretty significant buff to make it worth anything.