I also have a 2010 Rockwood 2604.
I asked the dealer about putting in pedestal legs, but said that was not a good idea since the pedestal support would have to be screwed into the plywood floor which is part of the slide. If the screws were too long it would ruin the carpeting underneath.
You could probably replace the legs with something similar to the existing legs, that were a bit stronger without any problem.
The other thing I was thinking about was installing the Dream Dinette table, but I don't know how much reinforcement would need to be added to the wall.
I spoke to my dealer about it, but he was not aware of anyone who'd done that with the 2604.