Tank enimity below 30 is lacking

[Jpec07]

It's a mechanical fault as it is NOW affecting them after the changes. It previously wasn't a problem unless the person just wasn't paying attention at all.

Except not really. Tanks 1-30 (1-40 for PLD) have always needed to adjust their play style to include more Flashes/Overpowers/Unleashes if they're losing enmity. The first few dungeons are meant to be a learning/teaching experience, just as they always have been. And as a new tank in 2.55, they taught me to pay attention to my party comp and adjust accordingly. BLM, THM, ACN, SMN, and SCH always mean that I need to work harder, tabbing between targets, spreading my enmity combo around, making sure I have a lead on everyone, and using Flash more frequently. This has always been the case on trash mobs, and is just as true in Lost City of Amdapor HM and Antitower as it was in my first Sastasha run. If a tank still learns the lessons of enmity management against packs of mobs as relates to group comp, then the system is working as intended.

Just because new tanks (may) need to be (slightly) more conscious of their enmity now does not mean the system is broken. It's still substantially easier to hold enmity now than it was in 2.x.