Tires inside partially worn out…different opinions: renewal yes/no

Good morning together, as I noticed louder rolling noises and slight vibrations/unbalance (the faster the ride, the smaller it is to remember), at my Passat B7 I was at the tyre dealer to have the wheels (19″ Talladega rims with Hankook Evo2 225/35) diagonally replaced (balances didn’t work out). There it was found that the tires were “down” and new ones had to come. In fact, the tyres – at least in the back – are partly on the inside. e (not all around) left, see photo. Since we will go to Italy in one month and will easily make 3500 km, I am unsure. – tyre dealer says: tires promptly new – car master of my trust says: finish season, next new – acquaintance with lots of car experience says: the rear new, the front next season. What do you say? The tires still have 4 mm profile. The tires are three years old, drive now the fourth season. The first season (2016) on a Golf 6 GT I, since 2017 on a passat B7 variant. The passat has been lowered with feathers since mid-March. Achsvermessung took place. I am very grateful for your opinions. I would like to order tires as soon as possible if it has to be.