Possibly not TooTall and we’ve had this discussion multiple times. I’m not saying that bigger sizes aren’t right, just that as with anyone regardless of size, assumption of sizing can lead to fit that isn’t the best for that person.
And don’t forget I’ve ridden a lot of different bikes some too big, some too small. The Bianchi is comfortably my favourite road bike to actually spend time on even if the geometry is supposedly ‘wrong’.
The smaller frames and long stems and seatposts just add flex to your ride.
Yes, in isolation but then the frame is smaller and without knowing the specifics of the tubes, etc it’s essentially a moot point IMO. Not to mention that some flex in the seatpost in particular may be a positive for comfort.