I can agree that these tags may need updating, I was only offering an objective interpretation of their current definitions.
The discriminator with a lot of tags is that they have to be
shown, not merely
talked about. If there had been a time lapse sequence showing Sterling going through the transition process, that would make a stronger argument for the transformation tag. The way it was presented, skipping the actual transformation, falls into a gray area outside that tag's definition.
If we had to tag games for everything we
don't see, we should get rid of the "No Sexual Content" tag, because without sex none of the characters would be alive.