I don't think Slime is worth the time after a while because the slice of life and world building aspects that it tries to prop up simply aren't even that good
when your idea of world building is simply slapping a previously unmentioned city/resource/faction to an existing plot line at a crucial moment over and over, then your world building story telling is weak and reactive.
even moreso when you drop the value or purpose of that newly introduced city/resource/faction as soon as that moment has passed
slime, at least in the anime, wants it both ways. they want to do fights and powerups and when those fall flat its supposed to be an evolving story based on the world - which is also weak.
proper 6 high tier mid. show takes turns disappointing people in different ways to disguise how shallow it is. still enjoyable but you're not missing out