It would certainly be possible to change this but would require a lot of modifications.
- Bulkhead would have to change its shape entirely, possibly requiring a new piece.
- the cutout for the galley hatch opening would change
- the hatch gutter pieces would need to be modified
- you may need different length gas springs to accommodate a shorter hatch
- the shelf and its fiddle rail would need to be cut shorter
I too thought the galley space was larger than I needed, that is why I opted to use part of the galley space for cabinets which are accessed through the bulkhead. The cabinets didn’t require much modification to the base construction, and I believe they were an invaluable addition.
Left and Right boxes are the cabinets, the center is for the electrical.