Thanks for the feedback! The idea is that the festival board is like the Burrow for the Underground Duchy, a seperate "clearing" that is adjacent to the Revel Token, it would sit in front of you, like the burrow.
When succumbing to the Revel, you can move both your warriors or enemy warriors, although you would want to draw in enemy warriors most of the time.
Using your own warriors to fight in the Revel is supposed to be a last resort, as it gives you half points, but it could give you a few extra VP or make sure no warriors get returned after the Feast.
Abattoirs are mostly important because they increase the strength of succumb to the Revel.