Yeah you are right, I’ve many friends from Australia and they are getting immense amount of lag in their game because of lag spikes, jitters and random disconnections. Though, I was also getting a lot of internet and fps lag with the game.
Right now, I am playing Battleborn with Kill Ping, it’s really working great for me. At least I am able to control the disconnections and jitter problem though, lag is somewhere still there but it’s totally bearable for me. You can check their guide on How to fix Battleborn Lag http://www.killping.com/blog/guide-to-reduce-lag-in-battleborn/
I hope this helps you. Also, if you like you can try my account with the game.