You could always you know, hit Sableye or Spiritomb with a powerful stab and kill them that way. Plus both rock Will-o-Wisp making most Bug attackers useless, aside from Heracross & Volcarona. Type neutrality is not a weakness, especially to a type of Pokemon very weak to status & stall.
Not really a big deal, and not the first time they've altered Bug's type effectiveness.
It becomes a weakness because the x1/2 against Ghost used to balance out the x2 against Dark.