I can't see that QWC is likely to get integrated with Sense Enterprise. It's a natural move to put this onto the Connections tab in Cloud For Business, as users are not able to install their own connectors / drivers.
I'm not sure which connectors are in QSC4B, but there are a number of connectors that are available for free in Qlik Web Connectors. You can just download and use these with Enterprise right now.
I can imagine that they will fix the problem that you have to change your Sense server into 'Legacy' mode to make QWC work (eventually), and it may appear on the Connection button in Sense. I can't see it being fully inclusive though - because of the licencing of some of the connectors.