this is exactly what we're doing in 4.1

Nope. In fact, this is exactly what we're doing in 4.1. :)

Right now, you receive 70 VP for the first random Cataclysm Heroic dungeon you complete each day. In 4.1, you'll receive 70 VP for the first seven random Cataclysm Heroic dungeons you complete each week. Similarly, you'll receive 140 VP for the first seven random Rise of the Zandalari Heroic dungeons (the new Zul'Aman and Zul'Gurub instances) you complete in the week, too. Collectively, you'll be able to earn up to 980 VP max exclusively from Heroic dungeons, which in turn will count towards your weekly 1250 VP cap.

By transitioning random or world of Warcraft Heroic dungeon rewards from a daily format to a weekly one, we'll be able to give players more control and flexibility over how they can earn VP -- which is cool! -- but this also means that we've a lot more bookkeeping to do in terms of where those points are coming from. To help with that, we're adding a "Valor Point bar" (similar to an XP bar) to the top of Dungeon Finder UI that will track your weekly cap, as well as how many Heroics you can still run for VP during the week.