Don't trust the high rating. This manga is 4/10 for me. -1 more because of bad art but art can become better over time.
Here's my attempt to fix the story, mc has to stay at least 30 days in a world before being summoned again. That way the story would be more interesting because we would see many types of world to explore and interact with but with a 1 month limit. Each world has to have unique properties/environment/magic system/culture/dangers/language/tools/vehicles. And there had to be some kind of restrictions. The mc has to learn all of them to survive in each world. To make things more interesting, mc won't get his power/skills before completing a certain task in each world. Or, mc's power could be restricted to be only usable in that world. This way, mc won't ever had the chance to smile like a chuuni. Instead his face will be more like subaru from re:zero because he should think things over and strategies before doing anything. But the cons is, author will have to think for a new, plot-armorless, unique world many times over. The pros: author will have infinite arc to work on and they will still be logical and interesting.