What this comes down to is high level play.
At max speed, having a Poe vs Poe basically throws the ability to win to RNG. Whichever Poe goes first Taunts, therefore reducing meter by 25%, and allowing not only other Turn 7 characters to go, but also Turn 8, and possibly 9. If you have other meter reducing characters on your team, you can throw this back further still, and guarantee your team a full turn to eliminate at least 1 of the opposing teams nukes, while ensuring their first turn will be focused on your Poe.
Take away the turn meter reduction and replace it with something else tankish (Def Up, Health up, Ten Up, etc.) and Poe is 100% balanced and fair, and exactly where a good tank ought to be - up on the front of turns, with decent health and tank abilities. End of discussion.