That's not surprising, given that Pictomancer was designed as a Black Mage alternative. Yoshi-p probably had a lot more involvement in its design, to the point where he can comfortably play and describe what is happening with tooltips turned off. I learnt a lot more about Viper from the posted transcript, where it seems like its focused on juggling buffs/debuffs and executing your burst before they all fall off. Ideally they should have brought a melee job designer down to demonstrate and explain.

The problem comes down to being able to find people who are simultaneously proficient at the technical aspect of their job while also being comfortable in front of an audience. Outside of Koji and Foxclon, there isn't really anyone else who has the charisma proficiencies to do it without Yoshi-p mediating. You could probably imagine how a Q+A session with a tank or healer designer would go down.

I personally wish that they broke these down into more frequent, focused, and shorter sessions, but I think the keynote style approach is meant to pair up more anticipated developments with less interesting ones. A lot of these suggestions were made previously around Stormblood, but I think they're just more comfortable with the current format.