Remember that no rod is at its best with heavy multiple fly rigs, which are often derecked into the deep runs and boils rather than really cast. Watch the drift-boat sports on the East Outlet with their bead-head rigs and bobbers (excuse me, strike indicators) and you'll see that they aren't casting much at all. A lot of close in "high-sticking" is done the same way up there, and a cane pole would be fit for the task. Nothing wrong with fishing this way, except it doesn't really involve fly-casting or show the capability of a rod with a balanced leader and fly rigged on it.
That rod will fling an 8 half way across the East Outlet, but it will, if anything, be more tiring. You could always ease up back to the 6, or a good all-around compromise would be a DT 7. If you really want to lighten up, it would even cast a DT 5 as far as you can manage a dry fly float across the complex currents in the East Outlet. Except for the weight of the rod, though, it will feel more like a stiff graphite rod with a line weight that light, and you won't have much casting feel. It will even chunk a WF 9--put a #6, 8X long, sleek and sparse Barnes Special on--wherever you want to swim it. I've used all these lines on mine over the 30 years I've had it, but it's best with a 7 or 8, and tiring no matter what. I think you saw all the early discussion of the rod, but here's a link to work back through:
http://fiberglassflyrodde ... m/reply/40053#reply-40053