Congratulations! You have made the most boring, dull, uninteresting, soulless, empty, unnecessary, overexploited, decadent sequel in the story of anime till that time.
When even the creators state that this sequel shouldn't have been made, they mean it. It has nothing that made the first season good, in fact, it has almost nothing, it's like you asked Tanoshii Muumin Ikka on Wish or something, as it looks like Tanoshii Muumin Ikka but the more you look, you feel scammed by realizing this is worse than what you asked for in every aspect.
What made the 1st season great was a lot of factors, first, the slow but noticeable plot progression, it was nice to see the story starting on a cold winter, having the seasons come by, feeling the time slowly ing by, and how the characters grew up during that time, adding to that the charm each of the four seasons had on the plots and how the story used them in their favor. Now look at season 2, all episodes take place in the same season, possibly summer or spring idk, the continuity unlike season 1 is nonexistant, making this a totally episodic series; that isn't bad by itself but it marks the loss of what made Moomin memorable.
The second part that suffered was the sound area; the first season was really lively, the soundtrack was varied and it was used accordingly, as well as having music in most scenes. Now seeing season 2, there is no new soundtrack first of all, and second, a significant part of the episodes have no music at all. This season feels so dead while you watch it, and it makes scenes feel longer than they actually are. Another part where the sound failed is that the narrator is not present at all, she does not give any context at the beginning for the story, nor she gives a nice conclusion at the end, that making this season feel empty.
Animation is the third part where this season suffered. Starting with the problem of characters being off-model more often than not, with characters being heavily disproportioned at times, or having their features badly drawn. The second part is that there are parts with no movement, making an excessive use of camera panning to simulate movement, something that barely happened in season 1. The background art is also way less detailed and in some cases there is no detail at all.
Finally, characterization was affected too, with everyone having a flanderized personality now, as well as adding characters for the clichéd plots of Season 2. The main cast here is barely reduced to being recognizable.
Overall, avoid it.
