I am comfortable with the UI as it is. If I am to persuade the rest of the company to buy into it they will ask whether it will work from mobile. At the moment it’s ‘not yet’
Appreciate this is a big piece of work but would open the tooling up to a much wider audience. At the moment (making assumptions here) but your current active user base is very tech literate.
I believe that this could be chunked up and could start delivering better value by focusing on a few key pages