This started as something with a somewhat interesting high concept. It's since tried as hard as possible to ignore it and become the very bland battle manga it's apparently always wanted to be...
Agreed.
But isn't that the fate of almost all interesting manga where you have some RPG/SF story with leveling/progression and skills/abilities?
They start out interesting, and when the protagonist has leveled a bit, the mangaka runs out of cool ideas, and starts swooshing, and going close-up fight scenes, and if it's manhwa, you often get colorful diarrhea Christmas lights all over the pages ...
The (maybe) worst is, that so many seem to prefer the swooshy stuff ...
One of my favourites,
D Genesis: Dungeon ga Dekite 3-nen
even has comments saying it's boring.
To me, it's the opposite, since it does cool stuff like including things like Earth politics, sciencing what's actually happening physically to humans who level up, etc.
And there's even some action (although apparently not enough for some ...).