I don't know why people insist on EVs being kind of ugly and boxy, but Ferrari had a chance to do better and didn't.
I think they are just falling into the same trap all other manufacturers do at first. They think the customer buying the EV is a different customer, who didn't like their other cars. So they make the techno-future mobile for a customer that doesn't exist.
Just make the same cars with an EV drivetrain, that's what the person who loves your brand but is in the market for an EV wants.
The retrofits usually are less preferable not only because of pointless inconveniences like transmission tunnels, but because they'll be the manufacturer's first toe dipped into the EV waters. The retrofit chassis speaks to either a rush to market, or a cautious approach not wanting to commit too many resources. The former says it'll have issues, the latter says they might bail on it and leave you stranded for service and repairs. Or both at once.
This is correct, but I really don't see why Ferrari would care.