Family bonus does not qualify for Tier Miles - so you stay blue!
You're not missing out on too much though, as the lounge for Silver and Gold members traveling in Y is still in the old terminal, and unless you have a really long connection, apparently it's not worth using it!
I went to meet some friends the other week in the old Irish Village as they were flying out on a none EK flight about 20 mins before I was - it was a real hike. So dont despare!
ALSO BARE in mind, that you do not get bonus Teir miles under the Global miles promotion - it's only the regular miles that go towards flights and upgrades.