Well, I spoke a little too soon. The blueberry flavor at bottling time was trumped by the pomegranate. The beer tasted dark fruity, sour and good, but I'm not sure I'd say blueberry if I didn't know it was there. The same can be said for a few pro blueberry beers I've tried.
It depends on what you want it to taste like. If you want it to taste like Boo Berry cereal, use blueberries and some blueberry extract. If you want it to taste like fermented blueberries, try 96oz of blueberry juice. The juice tastes great. Fermentation makes it taste less like blueberries, but still good.
My opinion might change when it's ready to drink at the end of the month.