Deal with markup directly
Add a feature which enables the user to directly input SVG markup into the application, instead of having to import an SVG file all the time. Will save a lot of time for those who make SVGs by hand like me.
Also, I would like it if I can just switch from graphical editing to markup editing seamlessly within the app. It would help with developing SVGs a lot.
If you paste SVG code directly in Illustrator, it gets pasted as an art, not as a code. You don’t have to import it as a file.
As for markup mode... SVG is not the native format for Illustrator, so the data is not stored in it all the time, unlike Inkscape, for example. Some object Ai can work with SVG can’t handle at all, so the conversion you want to have won’t work for everything.
Here’s a longer explanation by Monika Gausse: https://community.adobe.com/t5/illustrator-discussions/svg-files-doesn-t-open-correctly-illustrator/td-p/11367580