Thinking back through the logic of the ping pong system, it's more of an overall match balancer - It makes breaks (where you win your opponent's pick) less of a jump ahead, and makes it closer to a step I think. I don't think it's going to have a massive impact on matches that don't go either way, however it in general will make closer matches much closer. This is important where rolls in these close matches can really determine the upper hand for the entire match.
tl;dr
basically, in matches where expected to sweep, rolls don't really matter, and the ping pong pick doesn't really impact anything given the one player's superiority in the given mappool.
In matches where it's completely up in the air, there's less of a chance of one player managing to win all their picks off of a good roll, being able to ban second and pick first. If one player gets to match point, it's much less likely that the match just ends with them picking another song that they're strong at - the other player will be able to exercise the "extra ban" that will happen at the end if it comes to tiebreaker. this even makes it closer if the player losing the roll is slightly stronger, the extra tiny pick advantage will go to the weaker player
actual tl;dr
ping pong pick makes matches closer inherently, which is cool because #tiebreakerHype
tl;dr
basically, in matches where expected to sweep, rolls don't really matter, and the ping pong pick doesn't really impact anything given the one player's superiority in the given mappool.
In matches where it's completely up in the air, there's less of a chance of one player managing to win all their picks off of a good roll, being able to ban second and pick first. If one player gets to match point, it's much less likely that the match just ends with them picking another song that they're strong at - the other player will be able to exercise the "extra ban" that will happen at the end if it comes to tiebreaker. this even makes it closer if the player losing the roll is slightly stronger, the extra tiny pick advantage will go to the weaker player
actual tl;dr
ping pong pick makes matches closer inherently, which is cool because #tiebreakerHype