Apple only outed Ping – its music-focused social network baked into iTunes 10 – yesterday but the verdict online hasn’t been good. Perennial early-adopter Robert Scoble summed up the general consensus in a tweet: “PING = Ping Is No Good. Geesh, Apple, you could have copied a lot of the innovations that Facebook and Twitter have shown you. Sigh.” We’ve rounded up the 10 most common criticisms of Ping and 10 ways Apple could fix them in an iTunes 10 update…