I have not seen anyone do this with a Omni / Magnitude.
There is only two of us and a small dog in our SV34. We find the table space does come in handy and this year my wife bought two small rolling baskets to store things in that fit right under the table. I also used the space under the dinette seats for my lithium battery conversion. I also installed a central vac under one of the dinette seats so I am using all of that space.
I would say what you want to accomplish should be doable. The seat belts can be unbolted easily. I did that to remove the metal structure to give me more space for the batteries. You can remove the faux leather from the wood, cut it all down, redo the faux leather and reinstall the drawers.
Cutting down the table may be an issue since it is just cheap wood and a crappy vinyl cover. You might want to just make your own table.
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