Planetary bonuses are quite a cool feature and something that further distinguishes planets and makes them more valuable / more of an asset. Yet on the huge maps i play, too many planets seem devoid of any of them 
A slider to adjust there frequency for me would be awesome!! (so all planets had both bonus slots used whetha 2 bonuses or 1 bonus / 1 artifact), but failing that jus boosting there appearance would be good, cos they are cool and like i said make planets more unique / valuable 
thoughts / comments appreciated
Also on larger maps, people have often said how they get bored of taking planets and chasing the AI around but with a higher bonus frequency maybe these people would have more inclination!!??