Tensei shitara Slime Datta Ken 3rd Season

Now, I will admit that so far, as of EP4, not a lot has happened that is visually appetising to the typical isekai enjoyer. There's not been any big fights, or any characters showing off how OP they are (Diablo does show his power, albeit differently).
Most of these initial episodes have been a lot of monologuing and setup, which is actually a lot of what happens in TenSura; This was the same kind of thing that happened when S2 started airing as well.

TenSura does indeed have epic fights and I'm sure, based on what should be covered this season, we will be seeing some in ... some of the later episodes, but what makes TenSura what it is, is the world-building, political intrigue and Rimuru building-up his city, which is what we are currently getting in the initial episodes.

Rimuru has just come back from Walpurgis and decisions are being made as to what needs to happen in regards to the Falmuth Kingdom. In the background, we have backstory on the "antagonist" Hinata Sakaguchi and the fact that she has ties to Demon Lord Valentine, while Yuuki Kagurazaka and "Ex" Demon Lord Kazaream scheme on their next moves.

So far, the intrigue and hints at what will happen later, are more than enough to keep me invested and watching this show. As much as I like my over-the-top fights and typical isekai trash, TenSura is one of those shows to savour and enjoy the slow-burn up until the big payoff.

I'm putting this as 8/10 - Very Good at the moment, as I do believe the anime is being well-written in these first few episodes.

Tensura is not Souso no Frieren. Slow start is expected. Watch after half a cour has passed.

Start is building up from last season after the Warpurgis and is slowly getting us up to date with different parts of world.

It will build up to good action and more interesting story but it will be full length novel instead of short stories. Would suggest to wait to start watching show till at least 7-8 episodes have passed so that pace gets built.

Animation: Quality animation for isekai shows with good sound tracks.
Characters: Good goofy characters with quality back stories.
Story: Story is in starting phase with the characters being ... reintroduced and setting for the season is being made.

The first four episodes are just stuck behind that damn table. For episode 5, the table is only going to be changed; this is what weakens the narrative of the story. A good anime should maintain quality from start to finish, making each episode memorable. This season, however, the anime is a disaster. Maybe it will improve from episode 8 onwards. I don't recommend watching it now unless you have nothing else to watch, especially since only episode 4 has aired.
From what I've watched so far, it feels more like listening to a podcast or reading a newspaper, without any significant events. You could easily ... start from episode 5 without missing much of the story. It's quite hilarious when Rimuru orders each character with the same command, and this goes on for a whole minute. It could be more enjoyable if this dialogue were interspersed with flashbacks or different facial expressions to make the conversation more bearable.