I'm glad the new changes are working out for you! They were mainly aimed at balancing Nix's difficulty especially in Hardmode, where it was practically impossible before. With this update, it should feel more achievable in both Normal and Hardmode without becoming too easy.
I like the rebalancing, you still need prep/strategy/math/skills /full dojo for Nix, but it's less dependent on luck.
I don't know if this would be useful for anyone else, but a hovering tooltip above the sigil showing its name (and maybe the description) would be useful. Early on, I kept on forgetting which I had picked. I don't think it's a big deal because the name is one click away but it's something I thought of.
Also I'm curious if you have plans of composing more music for this game? Not trying to sound demanding, I just really enjoy the music :D
Thanks for the suggestion! To be honest I sometimes forget which sigil I picked too, and there is currently no way to check once you're underground, aside from Fortitude and Shield sigils since they show a buff counter. Instead of a tooltip, I think it might be more helpful to display the selected sigil as an icon next to the consumable slots or something. That way, even underground you can quickly see which sigil you have equipped.
As for the music, I am really glad you are enjoying it. I do plan to add more in the future, but the main concern right now is the file size. I try to keep Serenitrove as lightweight as possible. The entire game, including images and code, is only about 2.6 MB, while the 10 gramophone tracks alone take up around 24 MB.