Just some suggestions on improving the publishing features:
1. Revert To Previous Version
The ability for a developer to revert their game to a previous version is essential. Sometimes a developer discovers a big bug, and would like to revert the game to an earlier version. For reference, Roblox has a feature like this.
2. Reorder Screenshots
The ability to drag and drop the order of the screenshots.
3. Play From Core Create
When in Core Create, I would like to be able to have a button to play the game online (similar to the play locally button). Currently, I have to enter the link in my browser, which starts the launcher.