A Kerning Editor would fit nicely into the kerning feature, which allows to choose between optical, metrical kerning. The user would define his own kerning names.
The Kerning Editor has a GUI which allows the user to define his own kerning pairs which override the metrical ones defined in the font's kerning tables. There I can load the metrical kerning or the optical kerning as a start for my individual kerning.
Furthermore the new Kerning Editor has two more tokens/glyphs to kern with: the left and the right margin of a text frame. So the user can define his own margin alignment set, separately for every glyph in the font.

Since the EULA's of all font companies are very strict to not alter any part of a purchaced font, it would be very, very useful to manually change the predefined kerning of a font inside an InDesgin document, so you don't have to worry about kerning any more. The optical kerning method is cool, but often enough it provides not the best alternative to the metrical kerning.
Furthermore the optical margin alignment should be better worked out. The user should not depend on an algorithm, but should be able to decide, which glyph goes out how far beyond the textbox border.
(There is a competitive layout program which has this feature since v3.x ...)

I would like more control over the space insets in the paragraph shading options. When a long paragraph of text flow on to the next page there is no way to control the spacing above (padding) when we're in the middle of the paragraph and "clip to frame" is checked. It is possible to get away with it if the distance from the top-margin and the first baseline is sufficient, but most of the time I want more space. I think it would be better if the text was forced down to the second baseline if necessary. The end goal is to have the same amount of space above the text where the shaded paragraph starts and where it continues on the next page. This looks better. See the attached file.

I am a college student studying graphic design. In my classes the school provides Apple Mac computers to do our in class work. However, I own a Windows Surface Laptop. So when I need to finish projects outside of the classroom it is very frustrating to choose a font on the Mac only to have it changed because the font is not available/has to be imported on the Windows PC (vice versa). I understand that the platforms are very different from each other, but it is the same software. How hard can it be for Adobe to make the fonts in the software the same across both the Mac and PC platforms so that this reoccurring, very agitating problem of "missing fonts" can be completely avoided.

Not every base text font has all the glyphs I sometimes need -- some need only a few math or Greek symbols, others need Arabic, Chinese, Japanese, Hebrew, or even Devanagari. Currently I manually hunt and pick them from the closest alternative, selecting glyphs from a font CLOSE ENOUGH right down to the ever-reliable fallbacks of Times New Roman and Arial Unicode MS. It would help if I could define a custom font stack per "base font": a list of alternatives in a Preferred Order, which would each in turn be scanned for missing glyphs. Kind of (well, exactly like) browsers do with web pages. It would ideally be a separate list per base font; a sans font does not need the serif Greek from Symbol if there is a better choice (Myriad Pro, for example).

I prefer to mockup print projects in Photoshop (including text) because I have faster/better control when I want to edit images and previsualize the end result. Once I have my final layout I switch to InDesign and replace the text so it's not bitmapped before printing. It would be great if I could just copy and paste the text from Photoshop to InDesign and it would retain the font style (size, weight, color, tracking, leading, etc) rather than having to make all of those adjustments by hand. Currently copying/pasting font styles works between Photoshop and Illustrator, but not PS and InDesign.