WHM getting progressively more unnecessary in content?

[Yeol]

...

This is exactly my point. DRG will bring more dps due to their utility.

Increasing MNK dps to make up for their loss of utility is a very bad idea.

As for WHM. They are already good at healing and dpsing.
Sadly, they cannot do both at the same time at endgame because it eats up their MP. AST and SCH have no problem with doing good dps while healing because MP is no issue for them.

In dungeons WHM is superior because they can heal and dps at the same time due to having breaks between pulls that helps them get MP back.

All WHM is missing is a way to get MP back.