They are indeed creating a new brand image...and to be honest, I do not mind at all. They SUCKED at redoing what Valentino had been doing for like half a century. There was no soul in it whatsoever. Now that these designers seem to have realised just that, I think they made a right choice taking another direction. A direction where their own signature and style as designers shines through as well. I think they are slowly finding a good balance of their own aesthetic and the old Valentino aesthetic. But gove them time...I haven't been completely blown away with their work yet either, but you can see the growth.
These ads are more of their own aesthetic, but that's ok: fashion is change. As for the casting, it totally fits their aesthetic. And honestly, Valentino would have probably adored Jac as well if he were still active, so she's like connecting link between the new and old Valentino. What with her youth, yet haute presence and beauty.