I don't think they would nerf our dps because if they did there would be a super tank rage, which they probably don't want to deal with.
They said they were changing the calculation so that players wouldn't have to choose pentamelds over other gear.
I predict that they will use both vitality and strength in the damage formula so that savage raiders can use vit gear without sacrificing attack power.
The formula may be 3/4 Strength + 1/2 Vitality = Attack Power.
This way people can use fending or slaying accessories without sacrificing too much attack power as slaying accessory will have about only 25% more attack power contribution than a fending accessory.
If you do the math we would gain a dps boost, which would help paladins out.
And besides, tank dps being closer to a real dps's dps is good because when a tank doesn't tank it is acting as a dps.