I say rack to a secondary and add more spice by making a spice tea (see below). As mentioned, you don't really get "pumpkin" flavor and aroma from pumpkin. Its also important to use fresh, quality, spices. Just like using old hops, using old or poor quality (Winco bulk spices) is not going to do much. The Thundestruck Pumpkin Ale on this forum uses 1 to 1&1/2 tsp of quality spice and it turned out deliciously pumpkin-y! If you're not sure how much more to add, add some spice tea in small amounts, over a week or two, tasting each time.
Spice tea: Steep spices in one cup hot water for 10-15 minutes, cool, add to secondary.
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Secondary:IPA, just "IPA"
Bottled: Applewood Smoked Porter, Windy Bridge Stout, Maple Chocolate Pumpkin Ale, Maple Pumpkin Ale, California Steam, Black Cat Porter, Irish Coffee Stout
Kegged: Blackberry Stout, Nut Brown, Sweet Cider, Apfelwein #2, IPA, SNCA Clone