These current set bonuses are fine as they are for the current (for a lack of a better term) balance of the classes. These were worked on by many top players during 3.0 PTS, asking us to come up with new ones without knowing what changes we are facing with 4.0 is a bad idea. What needs to be addressed is the obvious problems with the class, such as in PvE the boss mechanics and in PvP mobility. Since there are no new Ops maybe mobility in PvP should be addressed first then on 4.0 PTS we can work out the set bonus.
I will say that having pretty much the same set bonuses across all classes takes the uniqueness away from each class, example is that before 3.0 there were only 6 out of 18 advanced classes had auto-crit abilities, less than half. Now every class as at least one thanks to the set bonuses. These current set bonuses, at least some of the 6 pieces are pretty useless in PvP situations where we can't really count or predict up coming auto-crits. Maybe PvP and PvE need to be different again and each give bonuses with respect to the different aspect of the game, PvP bonuses should focus more on utilities and abilities that help the player survive better or help their team in a way. Out right dps increase is more of a PvE thing.