Can we develop a weighed parameter for economy class including

seat width (base is 18 inch seat pan, 2 inch armrests),

*weight: 5*

pitch (base is 32 inch)

*weight : 7*

toilet space (base seat width 30 inch)

*weight : 5*

aisle width (base = 20 inch)

*weight : 4*

number of lavatories per 50 seats,

*weight : 4*

bin space per seat (volume)

*weight : 3*

The scores would be parabolic influenced. When an item is far below base value, the score takes a extra hit, while going much higher, it doesn't add much more value.

Not perfect, but better than nothing. We can't expect millions of consumers to go through all numbers.

If objectively measurable, it can be included on booking engines so people actually understand what they pay for, if they book a MAX200 or a 192 seat A320 flight.

Airlines can/will still specify cabins as they feel matches market needs and really stand out if they choose to!