Here is my plan for stretch. Wine 2.0 is coming soon, but not soon enough, so I don't plan to promote it to plain wine. So at stretch release, wine will be 1.8.something and wine-development will be 2.0.something. For buster, I think it will be better to use version numbers as the suffix for the binary packages in case we end up in a similar situation with two "stable" versions at the same time. Best wishes, Mike