The new breed of Visentini should be interesting. I haven't checked out passenger numbers & lane meters. Should be interesting. I prefer no extra vehicle deck. There seems a bit of the 'van der Gieesen de Noord' design (Norbank, Norbay & Ben My Chree), and a hint of Cotentin (Stena Baltica).
It wouldn't surprise if future builds don't find their way into service with P&O Ferries, Stena or Stena RoRo. If the passenger cert is high enough, and if they have around 2500 lane meters, they would make good replacements (in time) for Norbank and Norbay.