Normally, I'd suggest you edit everything into your original post to bypass the 1kchar limit, but in this case I'm actually glad you posted separate posts so I can like the first two but not the others.
But...that is what Quick Synthesis is for. You can do it right, or you can do it fast; and if you're a great craftsperson, you can do it fast to get a lot of normal quality intermediates, then do it right to turn those normal quality ingredients into a high quality final product.
You're not asking for a UI/UX change here. You're asking for a crafting system overhaul (for which there's another forum where people can discuss the pros and cons of this sort of change).
Your first two posts are UI/UX suggestions, and good suggestions at that, because we really could do without the break before starting and the breaks between synths, and it would change nothing about the difficulty of crafting or the quality of the end product.