There's a lot of good and popular Keldeo checks and counters and Beedrill doesn't really come in on anything, so that's hardly a reliable way of getting rid of Beedrills counters tbh.
Things like Latios, Latias, Starmie, Amoonguss, AV Tangrowth, AV Tornadus-T, Slowbro and Celebi all come in on...