have mentioned leaning and edging as steering methods. When I went from ww kayaks to my Necky Looksha Sport, the first thing I noticed was how responsive it was to just leaning away from the direction I wished to turn.
My uninformed opinion is that, for those of us with a lot of ww kayak experience, a rudder will be very useful in long, all-out sea kayaks, but of little or no use in short, responsive touring kayaks like my Looksha Sport. I took the entire rudder assembly off. For someone with long reach giving a strong sweep, a rudder is just so much drag. Remember also, that if you aren't going forward relative to the water you're in, your rudder can't act effectively. Planned sweeps work, moving or stationary.