1. quick , working on 2d view gradient tool + gizmo like in Photoshop for quick linear or radial gradient that would add its node automatically . 2d screen preview for curve node nodes placement maybe.
2. vector soft style path/shape draw with easy selecting each object . Current svg node is inconvenient and ancient as hell. Or an ability to import each vector layer same way psd layers do in psd importer. Just not so slow please.
3. copy/ paste working for quick pasting something without search for file with ability to re-link later if necessary. just for a sake of quickness.
4. vector shapes draw with material fill and feather edges quick option . I recollect old Creative house Expression which have noise based shape feather with extra curve settings to adjust the with of that feather . So lacking this feature. Those procedural things sometimes need just a tiny easy manual touch.
5. transform gizmo working not in 0-1 range but exact pixels . With ability to scale around set center of transforms . not just rotate but scale too. With a snap to pixels option. I love Affinity Designer for that matter for example.
6. split node that could split material into separate stripes. Asphalt edge and painted line for example . I start to do it together in one 1kx2k texture , then split into two in the end . Painted line as exactly 64x2k and road edge nearby as 256x2k . With current crop node it's monstrously inconvenient.
7. noise fills that doesn't squash or stretch when you go non square. And not scales too.
Not that all those things are not possible to do with pixel processor , functions and fx maps . I spent last 10 years doing such sort of conveniences on my spare time but I am not a programmer and my things work slow and glitchy. They each time ask for some long forgotten resources and I absolutely have no time and stamina to debug them. The last one I did in a sort of crazy state and years after still couldn't figure out how I did it and why it suddenly works . In all honesty both pixel processor and function editing don't tell you much or show good enough of digits preview you have with geometry nodes in Blender for example . So you often have no idea whats happening in the flow really.
Would be so nice if software would be not just flexible sandbox for construction but be really simple and convenient at the same time.