I wasn't able to see super closely, but meter was going up from Auto-Attacks correct? Maybe blocks as well? And I would hope that there would be a skill that use 80% of the meter for a big effect of something. Sheltron took away from the meter by around 40 I think?
What I'm curious about was the skill that looked like a "Smite". The PLD raised his sword and lightning crashed onto the blade, and then he struck. More magical damage? I'm super curious about that aspect of the job. The new holy took up 5 from the meter as well.
Also something I noticed, they did Fast Blade > Riot Blade > Royal Authority. Maybe breaking combo for cool-factor but that would be interesting if they changed it.
And finally, after the shift to Shield Oath, the meter did not fill up any longer. That's an interesting factor.