Update To API Management Workspaces Breaking Changes: Built-in Gateway & Tiers Support

Hi budzynski​ 
Do you have any timeline for when we can deploy Workspaces that can use the default/built in Gateway of API Management? Private Preview? Public Preview? GA?
I think we kind of missed the first preview where this where available and went straight to the GA, that required use of Workspace Gateway.  This was not ideal and had to many constrains for our use.

Questions:
Custom domains:  If a Workspace targets the built‑in gateway, can it inherit and serve the APIM service’s custom domain for the built‑in gateway?
Network topology: Will Workspaces function with the built‑in gateway when APIM is deployed in VNET internal mode and fronted by Application Gateway for external publication? (use of same gateway address as APIM Instance) 
Geo‑redundancy: We use multiple Locations for geo presence in APIM. If Workspaces use the built‑in gateway, are those Workspace‑published APIs automatically available across all locations (i.e., geo‑redundant), or is additional configuration required?

Thanks
Joachim Løe