What is the casing thread count...
...on the wire bead Pasela’s? Just curious.
In an ideal world I would 2nd what others have said about re-lacing the wheels with modern rims (that still have the look you are after).
But to improve the ride of the 700c Rigida/Pasela combo you could experiment with latex inner tubes & also using thinner (tubeless type) rim tape. The tubeless rim tape will permit a bit more interior volume and the latex tubes can be very palpable with high thread count clinchers. With your wire bead tires it is possible that the casings are just too dead to let the latex tube increase road feel or cornering precision. I would do the front wheel with this treatment then road test it to see if you can feel a difference.