I'd rather not "interpret"...let's do things by the rules and see how it works out. If Williams just bought Pironi from you, then just leave out the whole Rosberg part.I'm sure he still is. One can interpret this "swap" as Williams just buying Pironi from McLaren.
McLaren is also the only tier 1 team so they are bound to get Rosberg if (when) they bid for him.
I believe this line in particular is what got us all worked up. Rosberg isn't actually free to race for McLaren...McLaren needs to go through the motions of making a proper contract offer.Williams have agreed that they will let Rosberg leave from the team to race for the newly crowned champions McLaren.