Not being able to change the source sheet has been a bit frustrating so I definitely have voted for this feature. My use case: I am managing Smartsheet WorkApps for 2 separate (but related) teams. I also have a Dev version and a Prod version so that we can test out new workflows and features without affecting our production version (why is this also not a feature?). In addition I have several views that should be identical except for the column in "restrict view by current user", so I have to replicate everything at least 8 times for the various teams multiplied by the prod + dev copies. Having this feature would save a lot of time.