Whoa, They got it!
They finally got their determination to win... But
It was too easy. Somehow, they fell short of making an emotional ending. In Fact, the main highlight of the episode was in Mashiro and Azuki talking about marriage.
What changed before and after? They had the same determination from earlier. The editor in chief could see the quality of drawings and stories anytime, so it makes no sense to disagree with the serialization before and agree after.
That's one way to look at it.
Another way is to think of Chief Editor as the mastermind. Had he not kept Trap on hiatus, Mashiro would be drawing manga without considering his health. Since the manga was on hiatus, He had to prove his caliber and excel in drawing manga while keeping his health checked. This made a win-win situation for everyone in the best case. However, in the worst-case scenario, which he was referring to, he would get his own plan backfired by either Mashiro giving up or losing his health entirely.
So that were two interpretations I could think of about the Chief Editor. The Second scenario would have been awesome had they explained his thinking. Otherwise, it's the stupid first case.
Anyway, On to the next...