bump for great justice.
I'm a US player and I have nothing but sympathy (and empathy on bad internet days) for anyone who has to play over 100ms.
Beyond this, I think it's important to note (as OP did) the loss of possible pro teams that could be coming out of the Aussie/NZ/Oceanic area. It's very hard for a pro team to look at someone who has a constant 200-300+ping and consider them as an actual choice for their team. I think adding another server would do wonders for the gaming scene, and it would reify Riot's dedication to the eSports they so generously helped build in the past.