I'm sorry, but this blog entry says nothing about this.
First of all, the subject line is talking about Otto III, so why should a player on another server read this?
Besides this, it only says that all 737-900ER with winglets and scimitar get the same mainteance level.
How should a player know that this has a negative influence on the 737-900ER with winglets?
[Edit]I want to say: negative effect could be on scimitar planes not winglest [/edit]
In this case I'm not talking about previous changes differed between scheduled and not scheduled flights as well.
I'm very sorry, but the wording of this blog entry is insufficient to inform about this change.