We I to make this, I imagine I would forget trying to thicken it too much and just reduce the liquid a bit towards the end by turning up the heat after removing the chicken to strip it and put the meat back in. The okra will thicken it a bit so could be useful to have a look at the carb content for them, and if acceptable to your own carb requirements, add a bit more okra to the recipe.
I'd almost always choose to eat this sort of thing from a bowl or traditional soup plate style dish, with a spoon on hand.
I know some folks use agar or xanthum for thickening, but they'd have to comment on that.