From official Blizz change announcement:

• The UNIT_{MANA|RAGE|ENERGY|FOCUS|HAPPINESS|RUNIC_POWER} events, and their associated UNIT_MAX* counterparts are now deprecated in favor of the single UNIT_POWER and UNIT_MAXPOWER event. The first argument is the unit, the second is the power type, etc.

This affects the power and tag elements

Sounds like it hits happiness too.

Power, Health and Tags have been updated to use UNIT_{POWER,MAXPOWER} in the cc-event branch.