Overall, a step down from season 2, and a major step down from season 1.
"Shuttle to Kenfori" is the only one, I believe, that I rated a 9 or up. A few were really good ("What Is Starfleet?", "Through the Lense of Time", "The Sehlat Who Ate Its Tail"), "Hegemony, Part II" was pretty good, and "Terrarium" was good but screwed up the end, enough to sour the whole episode.
More duds this year than others... "Wedding Bell Blues", "A Space Adventure Hour", "Four and a Half Vulcans", and "New Life and New Civilizations". More duds this year than seasons 1 and 2 combined. ("The Serene Squall", "Tomorrow and Tomorrow and Tomorrow", and especially "Subspace Rhapsody" are the only real duds of SNW up until now.) Considering how short the seasons are, that is NOT good.
I really hope we get a return to season 1 form for season 4.