I use the regular (L1?) section/forums for stuff like SpaceX news and such. News often gets posted sooner on L2 but pretty much any news over 2 days old gets passed along, IIRC. Though there is some unique content but since i've never seen it, then I don't miss it.
What really bugs me is when someone posts in the regular forums that "such and such was posted in L2" as though assuming everybody pays $90 a year for it. Of course space industry related professionals can afford that, and even write it off as a business expense/taxes.