You really should talk to the Captain and tell him why he loses his matches.
Really? When I started table tennis around 1992, the Allround Evolution was already on the market. So it really is a modern allround blade.
You should really talk to the winner of the singles championship from Hamburg and tell him that it's normal to lose 3 sets in the finals with his material. He is playing Mark V and Donic Vario without boosting. (Kai-Enno is the tall guy with the blue shirt)
There is no "old" or new, Korbel is a classic blade which will be played forever.
Korbel is also not an allround blade. It is an OFF blade and I would recommend either Primorac or maybe Persson Powerallround if you want a faster allround/slow offensive minus variant.
There are so many great All+ blades like Tibhar IV-L, Stiga Allround Classic, Donic Applegren Allplay...