Currently, scripts need to send a command line to copy from clipboard, this seems to be much slower on Windows than on MAC, making scripts not as optimized on Windows machines. Allowing scripts to have direct access to clipboard would fix this issue and make the workflow on Windows comparable to Macs in this regard.

And generally more interoperability with Illustrator and support for the SVG standard

I'd like to have the option to be able to import a folder I have labeled in finder (say "Music") and then have that folder auto update inside of after effects whenever I add anything new to the folder in finder.

I miss you h dot two six four
your size and speed we all adored
but woe the codec list is bare
and media encoders just as impaired
hope someday it will be restored.

I use a lot of the same graphics for multiple "Projects" and wanted to create a template in After Effects for consistency and lessen the workload. But It part of that graphic is to turn part of the video clip black and white I need to use an Adjustment Layer. Allowing Adjustment Layers to port over with .mogrt files would make things much easier for me and I'm guessing others as well.

Add a toggle in Preferences for users to default to Separate Dimensions enabled rather than something that needs to be turned on for every object.

It could fit really well right underneath "Default Spatial Interpolation to Linear" in the General Preferences tab :)

If I change the name of a a composition in After Effects that I got from Premiere via Dynamic Link, the name will not transfer into Premiere. Instead Premiere still shows the old name which results in confusions on whether its the right composition your editing and more. Also I can imagine that there could be problems reopening the Premiere project so that it will not find the AE comp because of the changed name.

After Effects does some bad math when I try to set the displayStartTime of a comp via script.
When I attempt to set the displayStartTime of a 30fps comp to frame 1000 (33.333333333333 seconds).
The result startTime is instead 33.3333320617676, which rounds down to frame 999.
However, setting the startFrame to 1000 manually in the comp settings does make the startTime 33.3333333333333, which should be the expected result via script.

When linking source text into a master property you currently get no input field. The process is to right click and edit and you can change it. I'd love to be able to just type it into a field in the MP list. A current hack is to use and expression string to define the source text but that can get heavy pretty fast.

I create still renders than can sometime be greater than the 30000px framebuffer limit of After Effects. While I normally will create 8K animations for playback, I will need still imagery for booth and signage designs at hi-res that mimic the animation, hence the need for larger framebuffers.

If a text has multiple fonts, font sizes, colors, scripts can currently only see those properties for the very first character.

This means scripts like my TextExploder (https://aescripts.com/textexploder/ ) or Text2Spreadsheet (https://aescripts.com/text2spreadsheet/) cannot preserve the text formatting properly, if the text has multiple styles.

Instead of providing a single value for the text properties, Ae should provide scripts an array of style ranges. The XD scripting API does this and is a good example of how it can be done.

Why i can not go directly to where I did render my frames just by clicking in directory link like it was always ?? Now when I click it it takes me to "My Computer"

It is possible to set and change each property of the effects with a layer selection dropdown (such as Set Matte or Compound Arithmetic) via scripting, however the selection for 'Source / Mask / Effects & Masks' is currently inaccessible (via script).

Please reveal this dropdown property to the Extendscript API for all effects with a layer selection dropdown.

Screenshot of this inaccessible dropdown is attached.

Blackmagic Raw needs to be supported natively in both After Effects and Premiere Pro. It is already getting a lot of use and will only become more and more popular. There are some things I still can't do in Blackmagic Fusion and I prefer to use After Effects. Please add it. It has an open API, so it should be extremely easy to implement. Thanks.

The Touch Bar could add an infinite amount of possibilities to increase the speed of using After Effects. For example, one thing I REALLY want is to be able to assign different buttons on the
Touch Bar to different effects and presets that I choose so that I can quickly access them. This can change the entire experience. Also, some smaller additions like the color picker, sliders, timeline scrubbing, and assignment of adding different layer types to buttons as well would be a very welcome change. I hope this could be added, because it’s extremely useful.

With extensions like Bodymovin and Lottie, the design community is literally screaming for a web friendly solution within AE.