Here's a few things I forgot that can really put this soup over the top. All of these are a great addition to the soup.
First you can hold back about a ~1/4 of the squash and dice it into ~1/4" pieces to give the soup some added texture.
Add some chopped pecans at the table for a garnish. It reinforces the nutty flavor of the squash, gives another layer of flavor, adds sweetness and texture/crunch. A heaping soup/table spoon or 2 per bowl should be plenty. (If you want to go all the way gently saute them dry over a ~medium low heat in a frying pan, stirring often so they
don't burn to bring out the flavors even more.)
Core, peal and dice up some apples, (green or red or both, your choice) saute them up in a frying pan in butter and a
little bit of brown sugar till fully cooked. Add at table as garnish, about same as above. You could even try pears.
The pecans and apples together are great in this soup!
You could add a little smoked apple wood bacon, diced up small, fried up crisp and drained on paper towles, add as garnish at the talbe to taste. Adds flovor and texture/crunch.
You could even cook smoked turkey wing or 2 in the stock. Simmer them in the stock for ~1 hour or so then take them out, pull the meat, chop it up, set aside, add (warm up in microwave) at the table for a garnish. It'll flavor the soup stock and add low fat meat to the soup for texture.
To me smoked ham hocks or ham off the bone would be too strong/heavy for this soup.
If you like the powdered ginger you could add a slice or 2 (~1/4") of fresh ginger root to the stock when cooking and pull them at the end. This reinforces the ginger flavor.
Jamaican allspice and pumpkin pie spice (premix blend) are 2 more holiday type spices you could try. I've used them all at one time or another. All these spices are strong so only add a little at a time, you can always add more if you like/need too. Sometimes all you need is just a hint of the spice. What I mean by that is you can't really say "oh I taste ....." but without out it in there it will be lacking something and taste kinda flat. Less depth.
You can leave out all the holiday spices when cooking. Then when it's done take some small bowls/ramekins, put a little soup in them (4 - 5 table spoons) and add a little of each spice in different bowls to taste what they'll do to the flavor. Go from there.
Tubenit I've seen some of the recipes you've posted some years back and your a very good cook IMO. You should be able to put a great version together that you and your wife will enjoy from the notes I've posted.
Brad