The list of members on the party page should show each member's HP. It currently does not. In the screenshot below, you can see the blank space before "HP" where the health should go.
This almost certainly happened in Release v3.66.1 Group Plans for Parties or in the release after it (3.66.2 probably; it's not on the releases page yet).

Thank you for fixing this regression, @TheHollidayInn! This feature is really helpful for healers so I'm glad it looks like we'll have it back shortly.
No problem, since I am the on that broke it :P.
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No problem, since I am the on that broke it :P.