So planet raid score was changed to include a planets offensive/defensive ratings a few rounds ago.
Thiis new scoring system builds ontop of that foundation, and takes away the concept of player planet bashing which I've seen happen way to often lately for no reason. Player planet limit remains. lvl and raided or not included.

current system:
score earnt is value of planet divided by amount emphasis on offence

new system is based on unique player planet raids:
attacker player level vs defender level. greater advantage less score
planet raid recorded in database. score calced.
planet re-raided, all stats the same, score calc'd the same == no change
planet re-raided, checks in database, you gained in level, but no change to planet or player level, score renewed, is now less, since you have greater level difference.
planet re-raided, but offensive/defensive rating increased. score renewed and increased,
planet re-raided, but defender level increased, so attacker now has harder time to raid, score renewed and increased.

When you mix you get variations. basically your planet raid score will be based on the number of UNIQUE player planet raids. since a planet you have already raided has already given you a score in the database.