No, it wouldn't. No games report subscription numbers anymore. Blizzard was the last to stop doing so. They report monthly active users. Especially when there's a a few dozen F2P games that don't charge subs.
MAU's can show the same numbers you're looking for. Quarterly profit shows how much revenue you earn.
Since there's no subs being reported unless you're going through the MAU's for WoW it's your opinion that subs dropped so drastically when Blizzard has countered this.