This might actually make me more inclined to purchase non-HBO. I often find myself wanting to change travel plans but being put off by the change fee. I might occasionally spring for the non-HBO when I think there's a chance I'll want to change my plans.
Agreed, but the devil is in the details. E.g. if arguendo B, H and K are semi-flex booking classes, will the same day flight change on a K fare allow you to move to a flight with Y4 B2 H0 K0 M0 L0 on the morning you want to make the change?