PlanetsCentral

If a team member looses a planet, the planet will still be shown as a yellow planet later, which might be a bit confusing. Also, sometimes old information is associated with a new owner of a planet. For example, planet level ally looses a planet, later I get to know the new owner by Dark Sense. Now, the number of clans is associated with the new owner. There is no information displayed that the 'number of clans' information is much older than the 'planet owner' information. A possibility to delete (some of the) planet information would solve these cases.

Noted.

(Number of clans should probably be deleted when the owner changes.)

Yep, and if easily realizable do not show planets as team planets if planet level alliance is set and owner information is outdated.

Old minefields could be automatically deleted, if they should have been scanned again in the last turn.

PCC2 cannot tell whether they should have been scanned again. There could be an ion storm hiding the minefield.

You can delete minefields manually. To find old minefields, use the search function, which has an appropriate expression predefined. Use PCC 2.0, earlier ones crash when you do that

Yea, that would need additional logic to check if the minefield is hidden by an ion storm. Deleting them manually is convenient, too.