It was stated by a dev that the tank companion tank stats will be fixed in 4.0.3 but it wasn't. Tank companions still are not getting their tank stats Shield and Absorb %'s they have the stats but they are not getting any benefit from them just like a player who doesn't have a Shield equipped.

Both Veeroa Denz and Choza Raabat companions are Force users with Force skill set getting tech power, this makes companions with a LOT lower influence rank better than them.

Shadow/Assassin melee attacks had a force cost reduction and had a perk removed from a passive that did the same thing, this change in the end reduced costs EXCEPT Serenity Strike which was on the passive did not get a cost reduction and now it costs 25 Force (a 3 Force increase)