TLDR: A lighten/darken tool similar to Pixelorama’s one. For easier shading.
Although Aseprite is great it is lacking a tool that is very important(atleast for me) that speed up workflow by a great amount. The shading ink works but it is daunting to have to make a darker and lighter pallet for your colors. It is much easier if you add tools like Pixelorama’s lighten/darken tool. It helps add more detail to sprites without going through the process of creating big custom pallets.