I like the ability to draw in perspective in adobe Fresco on ipad and bring it into photoshop to finish it as a workflow. It would be amazing if photoshop had fresco's perspective grid abilties so that it you could keep your perspective grid layouts in photoshop (even continue to draw and paint on them as well) . Could also make your own inside photoshop would be great too.
Same goes with the rulers features and symmterical draw in fresco and photoshop. Fresco being aimed mostly for ipad isnt very good as a desktop application but adding this photoshop intergration you can continue your work using the desktop power of photoshop. Also very helpful for people who have to design interior/exterior spaces a lot like myself.