If you are in a Force, go shorter. If you are in a Hyside, go longer.
220cm/230cm, IMO have no place on the river unless yer a turkey leg eatin' schlitz swilling' tuber.
Seriously though, the shorter paddle is vastly more agile and you have much quicker fine tune strokes close to the bow with a short paddle. If you use C-strokes, dufeks, or really any linked strokes at all, you want a shorter paddle.
If you feel like you can't hit your line without the power of a 230cm paddle, you are over muscling your strokes and might be compensating for making line adjustments too late, or sitting too far back in the boat.
I don't ever use a longer than 197 cm paddle, and I almost never paddle harder than about 70%. I ain't got a problem missing my lines, not on 200 fpm 100 cfs, and not on 80 fpm 8,000 cfs.