Bikepacking bags seem very fashionable at present. As I see it they are for off-roading especially on bikes with discs, fatbikes, full sussers etc where conventional racks are problematic to fit. I tihnk the handling argument is a bit of a red herring - tourers need steadier handling and the only issue is if panniers are too far back at the rear or too heavy on the front. There are a few American bikes designed for front panniers only, why this is seen as a good idea is beyond me.
I don't see a significant advantage for a decent touring bike, and the frame bags then create a knock-on problem of where to put bottles.
If you are touring on singletrack I would consider bike packs, otherwise if you have rack eyes, use panniers.
An overlooked alternative is a Carradice saddlebag - I can get all the stuff for a week's hotel touring into one plus a barbag.
I don't see a significant advantage for a decent touring bike, and the frame bags then create a knock-on problem of where to put bottles.
If you are touring on singletrack I would consider bike packs, otherwise if you have rack eyes, use panniers.
An overlooked alternative is a Carradice saddlebag - I can get all the stuff for a week's hotel touring into one plus a barbag.