I'll go out on a limb having done something similar.
The recliners are probably lighter than the sleeper sofa and the dinette and chairs. If I'm wrong, it's probably by less than 20lbs, so a non issue when you figure the weight of 2 people on the sleeper sofa and 4 people at the dinnete.
Biggest thing to check is the depth of the slide. The base of the recliners has to be completely on the slide floor and there needs to be enough space that the back doesn't hit the wall.
We did just the sofa and it was a great upgrade.