Space on mobile is very different from that of desktop. Odoo currently does change the layout of views on small screen but that really does not solve the issue.
Just reformatting the same desktop view is not good in many cases. For example there may be too many fields on the desktop screen and even with the reformatting of the layout it becomes cumbersome on the mobile to handle so many fields in a form view or list view.

What we want to achieve:
Can we specify totally different views that need to be opened on mobile devices? These views will have lesser fields and widgets that provide a better ux. eg. Can we specify that an action opens view1 on desktop browser and view2 if the user is using a mobile device?
Another example would be: Can we ask the browser to open a particular kanban view instead of the default list view (the default list view would open up on desktop as usual)

We are using v 15 ee but this issue applies to all versions and ce too.

Do we need to modify EE's theme to achieve this? CE provides a way to replace the backend theme but EE does not even provide that (please correct me if EE allows the default backend theme to be changed since I am not aware of it).

Even with a CE backend theme it would be difficult to pull this off unless there is a way in the xml structure to specify which views and default views should be used if it is being opened on mobile. Right now as I understand it, there is only one view that is specified and that same view is just modified in terms of layout to get some semblance of responsiveness.

Please share your ideas here on how we can achieve better responsive behavior in EE and CE. Thanks in advance.