We are an OEM partner and have Qlik Sense embedded in our own application for our customers. We sometimes use individual object or mashup integrations, but also use full app integrations for some things. In the full app use case there are still quite a few references to Qlik or Qlik Sense, which doesn't allow us to have a truly white labeled product (error/session/logout messages are especially egregious). We have managed to hide or remove some of these references via js or css, but this is clunky and unreliable.
To truly support OEM use cases, Sense needs to be much more parameterized so OEM partners (and really, any customer) can choose appropriate labels and images to align with their brands and be more end-user-friendly. The switch of the app loading icon to a generic one vs a Qlik logo in a recent release was a good start, but ideally these would be configurable.