Will the developers ever address the aggro mechanics for lower tier monsters?

I know many will think Unity and similar content does not matter anymore, but many new tanks cut their teeth on content like this. A tank losing aggro is like a DD job missing weapon skills continually.

When a new tank tries to build a party for a unity fight and simply cannot hold aggro (due to broken game mechanics) they will either quit playing tank due to being totally humiliated into thinking they are awful (due to broken game mechanics) or maybe even quit the game (if pld was their main)

I recently saw a PLD who worked on getting an Aegis, leveled blu as a sub and got the spells to /blu and after building a party for unity and losing aggro in seconds and never getting it back they have not logged in since. Can you fix this, even Trust tanks can hold aggro on this stuff better than player tanks so you can easily fix this.