If you were wondering when Riot would bring League of Legends' Dominion mode to Oceania, we can now confidently state the answer as "never". It was already struggling, so it's no surprise that Riot has decided to pull the plug.
It's not much of a leap to say Riot knew this was coming for months and explains why the developer was reluctant to bring Dominion to our region.
According to the official announcement, Dominion is being killed off for two reasons — it doesn't fit with Riot's "vision for the core game" and, well, no one's playing the thing:
We want to support game modes delivering consistently engaging and competitive experiences. Fewer than 0.5% of players actively play Dominion and we’re aware some number of even that small population is still bots. We haven’t been supporting Dominion, and we've trapped ourselves in a vicious cycle where the queue isn’t large enough to warrant major attention, but falls prey to bugs and periods of imbalance from the introduction of new champs and items (which then drives down the size of the queue, and so on).
It goes on to mention that the mode will be disabled as of 22 February. So, no great loss to us (no loss at all, really) and it puts an end to the wondering. That's good, I guess?
Retiring Dominion [League of Legends]