But still, "If anything it makes it harder to dodge since you have to take into account the curve when you choose to jump."
But, that's wrong, still. It curving makes it so that it's easier to dodge because you ~can~ take it into account, moving left or right more easily when it's at a vertical angle. This is about airshots, not shooting on planes or downhill.
But again, this is assuming that the flare was designed to single out opponents at range, which I honestly don't think is the case. The flare is for harassment and suppression in areas where the firebug otherwise isn't strong, and if someone has to move in a specific direction in order to avoid the flare, then technically it's still filling its role by provoking a response. I'd also much rather have it be able to curve around corners for pretty much this same reason: to be able to hit people around corners.
Besides, this whole "which is easier to dodge" thing seems awfully situational, and almost too miniscule of a difference to really matter. Can we just solidify the
role of the flare and work from there?