Hi all. Hope this isn't a FAQ, but I've been looking around for a while now...

We have overridden the standard page 'View' on most of our core standard objects (Account, Lead, Opportunity, etc.) with VisualForce pages that (in part) use conditional styles/components to show/hide output panels/buttons/etc depending on dynamic data on the current user or record.

Our hope was to be able to pilot Lighting with a small set of users that have the ability to toggle between Lightning and our current custom UX, so that they could provide initial feedback for Lightning migration.

Unsurprisingly, what we find when enabling Lightning is that because we've overridden the standard 'View' with our custom VisualForce page, even when Lightning is enabled, users do not see the Lightning Experience, but simply see our custom VF page in the Lightning color scheme.

Are there any suggestions for how we can allow users to toggle between Lightning and our existing UX view, without having to revert the entire company to the standard page 'View' for each object? That alone would be its own separate regression testing project on top of testing for Lightning regression issues.

Ideally, we would somehow be able to detect whether a user has toggled on the Lightning UI and give them the standard Lightning UI, and if they toggle off Lightning we can display them our custom VF 'View'.

Thanks for any suggestions...