There is an Asian server for Australians.
In Diablo 2 there was Singleplayer option, i.e for OFFLINE gameplay, but you could also play Singleplayer online, you just made your own private game.
You can't play an offline singleplayer in Diablo 3, which is dissapointing, they should have really added that option, but that is not the main reason most people are complaining, especially considering it was stated LONG ago that Diablo 3 would NOT have an offline singleplayer mode, so anyone who bought it that lives in a mountain or a cave where they have no internet or really shitty internet, is stupid.
Most people complaining are ones that want to play online whether it's alone or with friends/random players, all because they can't wait a couple of days for everything to be smoothed out, they feel like their life is withering away and they are falling behind in levels and items, lol. I just feel that if someone can't wait an extra day or two for the game to be smoothed out then then I think they need to get a life, lol.
For me I played just fine yesterday with my friend, I only lost connection when they did maintenance on the servers and today I played fine too with no connection losses. I'm sure I'm not the only one considering I saw thousands of people playing in public games. If I couldn't play due to server issues etc I would just wait and look again later, until it's fixed and I can play, rather than cry about it and give bad ratings on meta-critic, lol.
p2w? not really, the items that will be sold by players on the auction house can be found just like the player selling it found it, you don't need to pay anything to 'win', especially because in Diablo 3 items are not the be all end all like they were in Diablo 2, you will be able to beat players who have better gear than you. Not much content? Act 1 takes alot longer than Act 1 in Diablo 2 did for example, there is plenty of content right now and even more so once the PvP arenas are patched in, which is what alot of people are going to be playing.