I believe when you queue from a US server, you get matched with USW and USE players - the latter resulting in subsantially higher ping for OCE folks. This wouldn’t be the same approach for implementation of a merged BG group for OCE - it’d attempt to match you with OCE first for a few minutes, then expand to USW after that period - very unlikely you’d ever end up playing against USE players with that high ping.
And again - without this change, there would simply be no games at all for OCE players - so you could always just not queue 