Eclipse Phase is fairly comprehensive (I skimmed a huge encyclopedic document of theirs, so I'd have to say probably more so than OA), but doesn't really cover any topics that OA doesn't cover to some extent, so as far as relevancy goes, it isn't like there is a wealth of ideas we can derive from them.
Also, I don't like how they infuse a socio-political slant into their fiction. For instance, their encyclopedia's definition of "anarchism" is anarcho-socialism by default without even lending any degree of consideration to the other schools of anarchism, and then it goes to great lengths idealizing that system. Also, I remember reading that Posthuman Studios (the project moderators) take an active stance against "men's rights activists", which I suppose is understandable if the MRAs on the forum are promoting some form of mysogynist hate-speech, but thats fairly harsh because they appear to be a civil rights activist group with relevant arguments and concerns. EP and its community isn't as objective and unbiased as Orion's Arm's.
Also, I don't like how they infuse a socio-political slant into their fiction. For instance, their encyclopedia's definition of "anarchism" is anarcho-socialism by default without even lending any degree of consideration to the other schools of anarchism, and then it goes to great lengths idealizing that system. Also, I remember reading that Posthuman Studios (the project moderators) take an active stance against "men's rights activists", which I suppose is understandable if the MRAs on the forum are promoting some form of mysogynist hate-speech, but thats fairly harsh because they appear to be a civil rights activist group with relevant arguments and concerns. EP and its community isn't as objective and unbiased as Orion's Arm's.