My DW wanted to replace or dinette with a table and chairs in our 2010 Dutchmen.
Under the left seat is the furnace. It is not going anywhere. Under the right seat was a storage drawer and the water pump. I was able to remove the storage drawer and 2/3 of the right seat leaving 1/3 of the seat to cover the pump and an area large enough for a small kitchen chair.
If I replace the dinette table with a small kitchen table I loose the ability to use it for an extra bed.
I also added a 2 inch hard foam "cushion" under the existing cushion for better padding.
Almost everything in a TT covers something else.