I booked a 2 berth Club cabin in October 2022 and the price difference compared to a normal large 2/4 berth cabin was nowhere near £170 as I recall (£85 each).
The included lounge access seemed like good value at the time as it’s a much nicer place to whilst away the hours, plus there was plenty of food and drinks included. It wasn’t worth £85 per person though.
I believe they have stopped including 1 evening meal and 1 breakfast with the standard ticket on the new ships on the Pompey routes. Hence you will be eating much more food in the lounge compared to 2 years ago. You will have a while after boarding to drink & snack, meals and drink for a whole day then breakfast on your second morning. Breakfast with a couple of coffees would be £15. Dinner in the posh restaurant was 42 euros last time I went on Pont Aven, without any wine included. Then lunch and booze for a whole day. I'm pretty sure I could rack up a bar/food bill of £85 in that time frame.