Your system is so slow to use, wedding photography is not the old form a group, record a high quality image of it any more, and hasn't been for a long while. Today it's more like shooting a documentary and for that you need gear that you can use quickly.
I have been shooting digital for years, for sheer quality of image they are much better than film. Even more so these days with the improvement in sensors.
The APS sized sensor on my Pentax K5 beats the full frame sensor on my Nikon D3s for low noise and dynamic range. The only drawback is getting good wide angle lenses.
I mostly use my Pentax 645D in the studio or when working with crew, they do record much better images, but only when the lighting is right, it captures the subtleties better. But you can't use them effectively 'on the hoof' as it were.
There is no flash or other lighting in your kit, this is the secret to taking better than average images. You create the perfect lighting and the camera records it, that's all cameras are, an image recording device, my 645D records with higher fidelity than the K5, but what you put in front of the camera matters much more than how the camera records it.
I have been on magazine shoots where the lighting took most of the day to set up and in all honesty a point and shoot would have recorded a more than useable image. The secret is in the lighting and your mastery of it. It will take your images to beyond the next level, the camera is far less important.
Your gear will record superb images if you have the time to set them up, in a wedding you rarely have that luxury, one reason why I rarely shoot weddings.
Manual flash is a good way of controlling the blend between the ambient (moonlight) and the flash lighting components simply by altering the shutter speed. Surprisingly (perhaps) flashguns (strobes) are better at this than studio flash as they control their light output by shortening the flash duration so shutter speed has no effect on the flash component and just effects the ambient.
Chris