The datamined changes (which include the 9 second cheap shot, so take with a grain of salt) have put even more damage into Sanguinary Vein- instead of buffing damage by 20% to bleeding targets, it now is 25% to targets affected by YOUR garrote or rupture. If this is true, it has the following effects:
1)- In PvP, you will need to rupture every target, or garrote them, as your damage will be wretched without it.
2)- In PvE, putting up crimson tempest on a group of mobs won't give you the damage boost on your fan of knives. Since this has never seen any tweaking, it is probably fine.
I think this is what we get for wanting to have a reason to use rupture- currently, mutilate uses rupture because it procs energy and sub because of the auto-refresh (and combat rarely under some conditions), but without the auto-refresh, rupture would go out of pve rotations promptly unless given a reason- I think we were all hoping for rupture to do non-joke damage, but with the 25% buff being a thing (aka, rogues will do 75% damage unless the target is ruptured first), rupture could do NO damage and we'd still be married to it.
This also means you'll have to rupture damned near everything in pvp, which is, in my opinion, pretty terrible.