I’m always looking for ways to streamline workflow, so understand where you’re coming from. Point 2 I can’t however see happening, as it probably opens up too much in terms of plagiarism or copyright as it would involve either AI (don’t get me started on that) but also a lot of letter forms from different users would look similar…not to mention being technically a very complex thing to automate.
I think with point 1, what you’re talking about here are ‘global elements’, or ‘instances’, where a change to one is reflected across all copies of that feature .i.e serifs? This one is a little more feasible, depending on your workflow. I tend to use a mix of hand sketching and illustrator. Inside illustrator you could create a few ‘serifs’ (two baseline serifs: a left and a right. (Look at the bottom of an uppercase serif A) a few vertical serifs etc. Its possible to select all the shapes in illustrator and either use the ‘smooth’ tool or the corner options to adjust the radius and softness of the corners, effectively altering the look of all serifs at once.
That’s about the only way I can think of at the minute to create or control shapes at a ‘global’ level. For my own personal workflow I enjoy creating each of the letters and find it essential, particularly for the handwritten scripts, but as I say, totally understand the need and want to streamline workflow.