I must say that so far, the comments about this addition have been rather negative. What's needed is to find positive aspects that would make the people of Carignan comfortable with the idea. I believe that what's worrying the people of Carignan is the fact that its residents will be split between two different ridings.
So I think changing the name of the riding would go some way towards easing the transition, because they are unhappy about joining the riding of Montarville. I, on the other hand, welcome it with open arms, but don't think that the feeling is mutual. Something other than just the MP is needed to get them interested in this new name for the riding.
I also think it's important to mention the enormous amount of confusion that exists between the Quebec riding and the federal riding, including the very different boundaries. While the name "Montarville" makes a certain amount of sense for the Quebec riding, it makes no sense for the federal riding because it applies to the City of Saint-Bruno-de-Montarville. In my view, the federal riding ended up with the name "Montarville" because it just copied what Quebec did.