The monthly campaign are part of the main reason I have an excuse to play or do certain content. If these campaigns get limited to 7 days of the month, I'm not sure why I'd want to play the remaining 3 weeks of the month and would likely just cancel my subscription and play something else.

If anything spread the content out. As of now there's a lull of content until the update so if people are so concerned about missing out on content, move it so it's happening during this period a week before the update... Makes more sense then reducing a reason to log in and play by 2 weeks...