It has been mentioned before, but I want to bring it up again:

It is maddening that I need a very strong survey ship or a fleet that contains a survey ship to attack a ship graveyard and gain possession of whatever it contains because they are defended by 3 ships, but any AI ship can move over a ship graveyard and gain possession of what it contains without having to fight for it.

The first screen snapshot shows a ship owned by the Navigators that is NOT a Survey Ship and, in the upper left-hand corner, a ship graveyard (yellow).

The second screen snapshot shows the same ship now occupying the same cell that was occupied by the ship graveyard, with no damage (hit points still 24/24), no experience points (still 0/8), and owning the Probe that came out of the ship graveyard.  If they had attacked and defeated the usual 3 ships that protect ship graveyards, the ship would occupy a cell NEXT to the cell that contained the ship graveyard, not the cell that contained the ship graveyard, would have sustained some damage, and would have earned 1 or more experience points.

If this mechanic is intentional, I think you should rethink this.  If this is not intentional, you should fix it before you publish the release version because, when players discover that the other civilizations have this unfair advantage, it will not be perceived favorably.

Strong letter to follow.