I don't think Bug needs more attacks, Bug Buzz and 80 BP Leech Life are powerful, accurate, and have wide learning compatibility, on both the special and physical sides. I would, however, give X-Scissor an enhanced critical rate, because it has been rendered pointless with the Leech Life upgrade.
Literally always through X-Scissor
had an increased critical hit rate! Guess Aaron's Drapion was just lucky the roughly 1000 times I've fought it in DPPt. I'd drop Leech Life down to 75 to give it parity with other HP-draining moves like Drain Punch and Giga Drain.
Personally I think Electric should have a priority move. It makes a lot more sense than Rock having one (although Accelerock is a great move name), given electricity is notoriously fast. Make it the usual 40 BP but special (sorry Luxray!) given there is only Vacuum Wave. Wild Charge shouldn't have recoil - they can't make it 120 BP because then it would make Volt Tackle less special, so why not turn it into an Electric variation of Waterfall? 80 Power and a flinch chance (literally what people do when receiving an electric shock).
Dark-type version of Revenge would make sense too.