Re-design the Paragraph Rules section of the Paragraph Styles dialogue. See attached. The mockup is not refined, but it looks like it will work.

I have a 2013 MacPro with dual d500 GPU's and an Eizo CG277 Monitor...which is the pinnacle of graphic design monitors. I can't enable GPU performance?! Retina monitors do not have near the color accuracy of Eizos.
My Eizo connects via thunderbolt 2 and USB...both at the same time. The bandwidth is definitely sufficient.
It is ridiculous.... I have more than enough power, let me utilize it. Your requirements are not valid for professionals.

Please expand your list of GPU Performance systems beyond "Retina Monitors"

Copy GREP Styles from one Paragraph Style to another

Instead of using the same orientation for each corner option icon in the Corner Options dialogue, give each corner an icon with the proper orientation. See After.png.

When creating an Object Style and using Size and Position, the X and Y Offsets must be 0 or greater. This means you cannot create an Object Style that allows for bleed. I want to enter -.125 for the X and / or Y Offset to allow for bleeds.

P.S. The temp workaround is changing the Reference point, but if you change the Height or Width, you also have to adjust the X and Y.

Ability to sort fonts by install date, so the most recent ones are shown first.

Under Preferences > Units & Increments, the Keyboard Increments preferences should be application wide, not document specific.

People share documents and templates and have their own way of working. They expect keyboard shortcuts to work consistently. It is unintuitive if in one file point size and leading change in two point increments and in another they change in one point increments. There is no reason for these preferences to be document specific rather than application specific.

The GUI for Index item/topic management is painful to use. For instance, looking for an item means constantly having to scroll and expand/collapse items in the topic list, mainly because it is so small and secondly because it auto-collapses all the time. This UI should be in a resizable panel, a search field could quickly narrow choices.

The idea would be to be able to change the language of indesign as in Phostohop. After installing the desired languages via the Creative Cloud, it would be possible to choose the language in which you want to work. Most of the time people use 2 languages, English and their own language.
Why not install default international English and be able to choose another language for installation.

Add a 'Save All' and 'Close All' to the File menu. Photoshop and other Adobe software have had this since the '90s, so why doesn't InDesign? It's inefficient to click on dozens of documents one at a time in order to save them and/or save and close them. Please emulate Photoshop as the ideal example.

Specifically I hate having to click OK to close the message.
Could the same messages just appear in the search window itself instead of the current alert? Maybe with color to make it obvious?

The buttons and forms panel (used for making interactive form elements for PDF) is missing several options that are available in Acrobat such as:
* insert image button
* insert date button
* insert barcode button

There was a request to do this but it was marked FIXED and (in my humble opinion) is far from fixed - https://indesign.uservoice.com/forums/601021-adobe-indesign-feature-requests/suggestions/20482882-more-options-when-creating-forms-via-indesign

I don't use Adobe stock, and have no plans to. I see that under View > Extras > there is an option to hide "stock purchase badge." And in Preferences, there is a way to Disable Publish online. I would like a way to hide the Search Adobe Stock field from the Control bar. No matter how small the window gets, it is still there, even iff all the other (useful) options don't fit. Please allow us a way to hide it.

A preview checkbox in the grids panel under document preferences. So that you can make changes to the document grid or baseline grid without having to close the preferences panel in order to see the effects your changes have made.

Add an indicator to Swatches panel, showing which swatches are affected by Ink Manager. Would help prepress and collaborators know the true story of document swatches.
NOTE: this has been proposed by other users, but I was asked to post this after I tweeted about it. So forgive redundancy. Or take it as a sign that it's a good idea. ;-)