This was posted and bumped at the beginning of anniversary. I get that not everyone checks forums but there is seriously a bit of personal responsibility here to research this kind of thing if you don’t understand it.
Except in typical anniv player format, you’ve completely ignored the party for whom transfers would be a massive loss.
You only cite what anniversary players want, what blizzard wants, and what TBC players want.
What you’ve neglected entirely in your analysis the existing Era community itself, which would be met with massive disruption from a flood of bots, economy gamers, and resource hoarders bringing over items acquired on an accelerated timeline with dual-spec.
Your inherent disregard for the fact that there is already a relatively tight-knit community playing on Era that wants nothing to do with anniversary is part of the problem. Please try examining how your proposed actions affect others instead of just how they would affect your characters personally.
Start a new character on Era if Era is where you want to be playing. It IS that simple.