Why not do this? Does there need to be a weird anomaly floating in orbit of Earth and Qo'noS in order to get to the Captain's Table? Why can't the players that have access simply be rewarded a Transwarp that goes there. Wouldn't that make sense?
Then only players who have access would even know about it (from now on at least), giving it the mystery it deserves. You would be able to go there from anywhere and return to Sector Space wherever you left off (like a DSE), instead of having to travel all the way back from ESD/Qo'noS every time.
And it would get rid of the weird portal thing everyone complains about.