It does make certain builds more viable, that want the TWF chain but have to spread their build points across a lot of stats. However I'm against this unless both of the following two things also occur: 1.) +3 tomes start dropping as unbound loot in regular high-level chests, and 2.) +5 tomes are introduced into the highest level epics, such as the new raids.
Otherwise it's just selling raid loot, which was supposed to never happen.