The current 1.36 version has a bug, when the campaign file exceeds 2.2 GB of filesize, the file becomes corrupted. Blizzard Please fix this and increase the possible max filesize for the campaign.
If its not possible to increase the limit, then please create alternative way to plug the archives with content as custom CASC archives that will be readable by campaign.
Additionally, it would be quality of life changes if you added dark theme to World Editor and added folder or batch file uploads to the Asset Manager, but at least please fix this issue with maximum file size crash for the campaign file.