If we first take the anime in a vacuum, it an ok anime, one of those zainy shows you watch and keep coming back to even tho there is not much happening.
The characters don't get a lot development and a re very one note, the art style, and animation is quite average. Sound is mostly fine but in my opinion Rimuru's voice makes my ears bleed every time he opens his mouth and the opening gets pretty old pretty fast.
Now the real problem i have with the anime is its pacing and this is where the comparing will start.
Goblin slayer adaptation has managed to cover assembling its core cast in episode 3 and moved the plot at enjoyable pace blasting through its material in a pace comprehensive to a new time watcher and very enjoyable for me.
In the mean time Tensei shitara Slime Datta Ken is 9 episodes deep and still hasn't started the first main arc hasn't has barley just finished setting up the premise for the big story arc and probably wont reach the manga status quo of the "village" for at least the next few episodes.
In conclusion there was never enough material for a 24 season anime and doing a one piece on it and filing the anime with hidden filler like long shots and padded conversions just ruins it for me, but you might find more enjoyment in it if you binge watch it when it finished airing coz the story is fine getting little snipits of the story every week is just tedious.
