Support for custom tag names (showing a user-friendly name in the dropdown list of custom tags instead of just the identifier) has actually been added for years according to https://github.com/ezsystems/ezpublish-legacy/blob/master/extension/ezoe/changelog.txt#L506

However, this is completely undocumented, this should be documented in the ini file where developers tend to look for possible settings to customize the behavior of ezoe.