To be honest, no matter what qualities one feels Neymar brings to the team, I don't think the team on the whole would have done much worse* with Pedro starting instead of Neymar. My own feeling is that with Pedro on the pitch (who is naturally more conservative and link-up than Neymar), Suarez and Messi would see more of the ball, and the overall goal scoring would have ended up about the same, regardless of Pedro's personal goal tally (*once Suarez was back with the team, and with Messi in his current spot starting on the right wing).
Obviously, Pedro (nor any other player) can't replace what Messi brings, and I'd say Suarez is also one-of-a-kind. As a #9 stand-in for Suarez, from what I've seen, I like Sandro best.