NOTATIO

Intervening after a while...
Regardless of how well an AI will be able to perform this task or not, why should it?
I hope that editions that used this kind of tool will put a label on it "made with AI" so that it is at least honest and clear.
Personally I would never use AI in engraving beyond ...

Also, the diamond notehead without anything else refers to natural harmonics between the nut and the half of the string.
After that point a standard notehead with a harmonic circle is used.
If the starting point is before the half of the string, I would use a single notehead with a diagonal upward ...

One of the several blunders one can find in several Henle editions if one scratches beyond the surface or elegant engraving.

I have been working increasingly more on piano music as of late and I am trying to avoid unnecessary naturals whenever possible.
Here Beethoven's solution is the correct choice, and I would say the same even if it was by a second- or third-rate composer.
Cautionary naturals in different octaves in ...

Dotted half followed by a quarter, please!

I believe this is context driven.
While I have been trained to consider 5/4 as either a 3+2 or a 2+3, more than one composer asked me to group it 4+1 in several occasions.
In 5/8 this is simpler: either 3+2 or 2+3.

Strange... if you write 'p dolce' in the Shift-D popover it should write it in italic, assuming that you set up the Dynamics Font to be italic in general.

Indeed: use '1. solo' and 'les autres'.
Please also put 'dolce' in italic.

From your latest example: 'tutti la 1/2 interieure' is confusing. Either it is 'tutti' or it is 'la 1/2 interieure'. In this case I would just write 'la 1/2 interieure'. Then, in the last bar, 'tutti div.' is good.
Consider splitting staves in parts. I know in the score this can be too much of a ...

In my experience, the quality and usefulness of RISM has greatly degraded since their last big update (I think it was last year?).
Sometimes I even fail to find something I know I had browsed on their system, reason for which I always keep a permalink list of their pages for future re-use.