Hello,
Some tests have been done in the plugin but there was not "perfect solution".
The selection of the relay point can't change the shipping price ; so there is a need of creating a new shipping entry to make a difference between "relay point" and "home delivery".
But if you do want to have the same price for both, then a new entry in the list can be added, like it's done for Colissimo.
At the end the question was : should one configure handle both "relay point" and "home delivery" prices ?
Handling both makes the configuration difficult to understand, so does the settings.
Splitting it force the creation of various new shipping instances for the home delivery.
By doing the split, the Mondial Relay plugin would have two modes, the classical one with relay point selection, and the other which will be like the "weights" shipping plugin.
Regards,