Ok I will answer in two parts as I understand that you would have to be careful not to make a fellow autodesk product redundant 🙂
Realistic things required in order to not output to autocad:
1)The ability to add drawings of separate items in the design to the same 2d sheet. For example I design hyd reservoirs for my systems, but to send out for manufacturing, I need to show them with the lid separate so there are not too many hidden lines on one view. If I could select the tank body, raise a 2d drawing, and then go back into the design and select the lid to raise to the same drawing as a separate view, that would solve so many problems. An alternative way would be if you could copy and paste from one 2d drawing to another in fusion. That would achieve the same thing but in a more clunky way. Currently I have to have a 'body' manufacturing drawing, and a 'lid' manufacturing drawing, which is a rel pain from an admin point of view.
2)The ability to add centre lines as further annotation.
3)The ability to fine-tune the hidden lines view a bit more, i.e select how many faces you want them to see through or select how far into a model the hidden lines should show etc etc. Sometimes the hidden lines view just shows too much and the drawings become confusing.
4)The ability to import your own corporate border and edit the text on it to be relevant to the project. This is the other main reason for having to complete in autocad. Perhaps the ability to insert blocks made in 2d cad would solve this.
5) This is kinda linked to point 3 but the ability to have selected faces show as transparent in the 2d drawing. For exmaple if I have a rectangular enclosure, with some valves in it. On the 2d drawing I want to be able to see the valves inside, but not the inside of the valves too, if that makes sense, so essentially making the enclosure wall invisible. here may already be a trick or too existing to achieve this. I guess having the wall as a separate component and then de-selecting it when you go to raise the drawing.
And the things that would be great to be added but are perhaps pipe dreams as it would threaten autocad light, is the ability to add your own 2d elements within the 2d drawing environment on fusion, such as lines, squares, circles, tables etc.
Hope this helps. This is my honest opinion as to what is needed to avoid having to use other software, based on what I use it for day-to-day. Ultimately to use Fusion alone for manufacturing, the 2d side of things really needs to be up to speed, as a lot of fabrication companies etc are still strictly 2d only and probably wont change in the near future.
Looking forward to detailed views too, they will solve a whole different nightmare.
