2, definetly!

Here is my top-tier list of improvements:

1. Better alignment with CSS standards (auto-layout, relative element sizes, grid):
   Basically, any UI framework, whether it’s web, mobile, or native-based, supports these features in one way or another, so why shouldn’t Figma?
2. Native Slot editing (similar to what InstanceUtils does):
   That means defining the “children” or “slot” property on the component and then editing on instances: adding, rearranging, or removing children without the need to perform constant instance swaps, or detaching each time I need to update the content of some component. Must have for working with higher-order components, such as modals, menus, tables, etc.. 
3. Component properties:
   Pass master component properties to the child properties. Maybe more properties support, such as colors, reach text, etc..
4. Better variables support