Say you want to apply the 3D (Classic) Rotate effect to a complex illustration but you have a rogue anchor point that causes this message: An unknown error occurred. Click MORE INFO and try some of the solutions to fix the issues.

It has taken me many hours to figure out that a single anchor point (that is neither part of a shape or a path) is the most-likely cause of this error message. I work very clean, but rogue anchor points happen occasionally and it's incredibly frustrating to find.

The solution is to search through all your objects and find the single point. The issue is when you view all your objects in the Layers panel, a complete path (that does not cause issues) and an incomplete anchor point (that does cause issues) are both named <Path>.

I propose that single anchor points get renamed in the Layers panel as <Anchor> and not <Path> so that the error can stand out to someone searching for a rogue anchor point in 1000+ individual objects.

The Eyedropper tool has several cursors (it’s almost impossible to find any explanations about at helpx.adobe.com), displaying different states:
- a filled pipette for when you click,
- a pipette with square below to indicate a screen sampling,
- an additional T to indicate a text below,
- a reverse filled pipette to indicate apply mode.
However, some modes are missing.

When you have smart guides disabled (for any reason), you can’t tell which object the tool will pick from, what attribute or will you miss completely by a pixel. The Shift mode is not covered too. So we need these:
- a cursor to indicate Shift is held ('direct translation mode')
- a way to indicate an art is under the cursor and not the blank canvas
- a preview of colors picked and/or a hint to indicate which attributes will get picked if you click (and an option to disable it)

Illustrator could really use some modern UI design elements, like Pie menus for example.

Some, even basic, features are so frustrating to use as the only way to access them is via buttons in panels. With 4K monitor, this leads to a huge amount of travelling with the mouse.

Like, if you want to change the Width of the stroke, you have to do it from the panel. It should be able to do it, for example by pressing a hotkey, dragging on the screen.

And things like Align “tools” should really be in Pie menus, so you wouldn't need to travel all the way to the top of the screen when you want to align something.

Illustrator is quite frustrating to use, as its UI seems to be stuck in the 2000s or something.

...and there is still no color wheel :(

In Photoshop, when I open brushes, I can see a preview of all my brushes. In Illustrator, if I want to use any brushes, I have to first load a library based on the name of the library. I have dozens of libraries, and often they all have similar-sounding names. Not only is it frustrating to open the same couple of libraries EVERY TIME I open Illustrator, but I have tons of brushes I probably never use because I don't want to individually load 50 different libraries just so I can find a brush that looks like what I need.

Also can we open all brushes in one panel/tab please? I don't need to have six different panels/tabs open to use multiple brushes.

I feel like I need to emphasize that I have tons of brushes, and I'm at the point where I needed to draw a quick liquid-looking smear. It was faster to go to a royalty-free site and download a vector of a liquid-looking smear than it was to find the right brush in my library. For something that would have taken me about ten seconds to draw if I could find the brush quickly.

I use brand colours that have specific colour values in CMYK and RGB. When I create a design in RGB and then have to convert it to CMYK for print I have to import the CMYK swatches after changing the document colour mode to CMYK and then globally replace all the colours. I would like it if when you define a swatch you can have an option to give it an RGB value for RGB mode and a CMYK value for CMYK mode. Then you could switch between colour modes without having to deal with new swatches and colour replacement. I'm sure this could work and it would be a game-changer for me to only have to deal with one set of dual-value colour swatches for each client/brand.