What a second season! I don't remember enjoying so much a second season as I enjoyed this. I was afraid of watching it since the first one was spectacular. The development and the new characters are the key points responsible for making Re: Zero s2 worthy of its predecessor.
It's so disappointing when you see a sequel that doesn't have the guts to make the story goes on, trying to hold on to the success it achieved before, delaying the end of the story, and, unfortunately, that is the rule. So, seeing that much happening in Re: Zero, the progress towards the main goal made me feel relieved. I'm not a manga/light novel reader, so I'm saying that relying on what the anime has presented as the final objective.
Subaru has developed quite a lot. He is more confident, more self-aware, but still powerless and is crushed by reality. I loved how he's dependant on the other characters. Generally, the main protagonist says how much help he has received to achieve his goal, although it is not true. He gets there pretty much by himself. Subaru is different. His dependence is real. He gets stronger by accepting help from others. (not an easy process, though. He's stubborn) His enemy (by the enemy, I would say Fate rather than Satela herself) is on another level, so he needs alliances.
If the first season showed how love and friends were essential to making Subaru overcome his struggles, the second season offers a more analytical approach. He's continuing to do what he has done at the end of S1. But, Re: zero is a great story, so his characteristics don't vanish all of a sudden. He progresses and still is himself with all his flaws. Moreover, we have to remember, Subaru has been tortured all this time. So the despair, the primitive reactions are more than reasonable.
Talking about the new characters: I enjoyed each of the witches. They are not what I expected from the seven sins (maybe because I was thinking about the also amazing ones from FMA). Lust and Gluttony were surprisingly refreshing. The second one with her reasons to create the evil majins has got me. Echidna, finally her. The character I saw in front of the poster. It isn't easy to have an opinion about her. I only enjoyed seeing her. My impression about her is that she poses a greater threat than Satela, even though I don't think she's evil. The witch of jealousy was also a surprise, but I can't say the reason. Oh, of course, props for Subaru's father. One of the funniest father-son dynamics I've ever seen. Now I understand where the awkwardly funny humor of Subaru comes from. His mother is also something else. This trio deserve an OVA episode for sure. I'd watch with a wide smile on my face. Finally, I'll say relieved. Re: Zero is still a fantastic story.