Well not so positive:
- one big change is the fixed EUR amoung between classic and flex. Now it does not exist on most markets
- this structure will apply to all booking classes. meaning you could get a 1000 EUR Y fare that is non changeable and that has no baggage included, à la LH, perfect to get these travellers flee to Easyjet after the are asked for 50 EUR to check in a bag because they had no idea a bag was not included on these expensive "full fares".

To avoid unnecessary frustration, they should make Y B M booking class as flex only, the expensive yet not really full fares available in standard and flex (U H K L Q), and then the cheapest classes available also with light/standard/flex (X V R N E T Q for example).