I love the current flying system, i never could swing the old one....
but seriously, the lerk isnt meant to attack on his own, he spores the rines so the skulks can pwn them a bit faster, and umbras their escape, or visa versa, or both.
his teeth are like a snipers knife and pistol, theyre for when he screws up and lets them get too close...
in short, a Lerk should never have to fight on its own, its a SUPPORT class...
in a pinch, he can run in and bite too, if he can get his support fumes off at the same time... but keep in mind, the reason they have a delayed area effect attack is so they can use it and GET OUT