I would love to see this get worked into the Legacy system!
I haven't played in about 6 months now, and sadly it seems the Legacy has completely fallen away from notice with not a single new thing added to it... =/
The Legacy wide Datacrons are something a couple of friends and I have talked about several times too, the first time getting the Datacrons is fun, the second is... ugh, and the third - pretty much not happening for me...
I could live with it being a Cartel Coins unlocked feature too.