Very good idea, make actual use of the Valor Points and it gives players an ability to upgrade their gear without feeling like they haven't worked for some level of gear. I am curious as to how many levels of gear there will actually be made available, whether it's just a standard Normal level tier or whether it will cover all three levels involving the Raid Finder, Normal and Heroic raids much like the Crystallized Firestone allows you to upgrade normal pieces to heroic pieces on certain items. I think it would be really cool if Blizzard allowed you to get a Raid Finder level piece with a reasonable Valor Point cost and if you want to upgrade it to the Normal item level with slightly better stats you could buy a token from the vendor for 500-750 VP and use it with the piece to upgrade a rank, then a heroic level version of a slot could use a BoP boss drop from a Heroic raid.
Takralus - We recognize that making the tier 13 set pieces available only as raid drops leaves players much more subject to RNG drop rates/loot rolls, but we have a couple of plans to try and alleviate the sense of burden that stems from the randomness of token drops.
The way tier 13 pieces will be obtained in the 4.3 raid won't be unlike raids past, meaning players will still need to roll on multi-class set tokens. That said, we'll be tweaking the tier 13 10-player drop rates a little bit (for the better) relative to the 25-player version, given that these tier pieces can't be purchased from vendors for Valor Points.
In addition, due to tier pieces not being offered for Valor Points, another thing you'll see in patch 4.3 is a much wider array of desirable non-set loot (covering more slots than prior patches) available from the vendors, for those players who are unlucky with specific token drops, or who aren't interested in raiding—although, once you get more details about the Raid Finder, we hope you'll find interest in having a go.
Keep in mind we do intend to allow tier 13 set pieces to drop for those using the upcoming Raid Finder. Similar to the difference between normal and Heroic versions of tier sets, the Raid Finder set will have a lower item level than the normal and Heroic counterparts.
Set pieces from all three difficulty levels can still be mixed and matched for the two and four-piece bonuses.