Hi,
Yes, but I think that it's not very obvious for the user. At least the first time:
Switch the shipping address requires to go in a previous step (except maybe if "shipping/billing address part" and shipping are at the same step but we are less free in this case).
The first time (and maybe others) where he wants using Mondial Relay, user will fill the shipping address without thinking to the next step.
And if, in the shipping step, user decides to use Mondial Relay, because others options is less attractive, it's the same problem.
It's operational (and that's what important) but the old version was more intuitive -and looks more like users are accustomed to see on other websites- in my opinion.