Hi Nate - thanks for the reply.
I think ideally it would be good to see an identical experience between SharePoint on the browser and on the App.
One use case we have had is for nurses using a sharepoint list - 'patients' to select a hospital from a parent list - 'hospital'. In this case each hospital item has individual permissions set so the nurses can only select from a hospital that they are have read permissions on. On the browser it works perfectly but for the app the lookup column is inactive.
But for the general list experience in SharePoint it would also be nice to see some other improvements in how columns can be used - one thing that I can think of is to use lookup columns in calculated columns. These are the sorts of changes that would go a long way to make SharePoint a stronger tool for record management. I still find in project work we run into occasional limitations in SharePoints lists that necessitates awkward workarounds.