As you say packaging can come after the release.
Some of the breakages for macOS require fixes in SDL, and packaging for 32bit requires much other work (seems whl doesn't work, so a .dmg could possibly be made again).
I updated the milestones for those issues. I think you should now be able to modify milestones in bitbucket. Let's just assign milestones to things we do going forwards, and clean up the other ones as they are done.