I think STR will still be a viable option. They can't really go too far with this because the left side gear has both STR and VIT. They said that both stats would have a weight in attack power so it has to be some sort of fraction of a sum for each. They end result of attack power will probably be X% on VIT, Y% on STR, with a total that lands close to what we already have right now. So, depending on the weight VIT and STR gets, we can expect that STR accessories may still have their role depending on what other stat they have. For example, if a STR accessory has Determination and would allow the tank to reach minimum Accuracy, it probably will end up being an excellent choice over the Vit+Parry+Skill Speed in the same slot.

I think it's going to be very interesting to play around with different pieces of a same tier + crafted accessories. The BiS won't be as obvious anymore.