Laroche, I could not agree more with you. (slightly off topic)
Traders should exchange their skills. They should always carry a penalty in doing so, but in away that when used cleverly, the benefits to a trader would always be greater then penalties to a trader.
In my opinion, when FC fixed the Delayed Health Payment line, I thought "Hey, this is how I thought it would work". Nothing for a trader should come wihtout a cost for his own skills, abilities or HP/NP. The cost should be high, but benefits should be greater, depending how high penalty is the trader prepared to take. However, as traders do indeed need these lines of nanos to be effective, the benefits should always be much greater then the skill penalty to either trader or the opponent.
Divests for example, could have been the attack skill drains, but when trader uses this like, they would have to carry a penalty to their nanos skills. While the opponent would lose some of their attack skill, but not nano skills. (higher the nano ql is the higher the benefit is, and same for the penalty)
" A trader uses Divest Attack Skills and successfully drains 204 attack skills from the opponent. Trader loses 180 from his current nanos skills for a duration of 3 minutes while gains a benefit of 204 to all his attack skills. The opponent loses 204 points from his attack skills for a duration of 3 minutes while gainst 120 to his nanos skills."
Plunders could have been their nano skill drains with a penalty to trader's attack skills. While the opponent would suffer a penalty to their nano skills, but not on their attack skills. (higher the nano ql is the higher the benefit is, and same for the penalty)
AC debuffs, should work as they are, but with a slight penalty to traders evade skills. etc., but again penalty should not be greater the benefit in a long run.
Given the current game dynamics and how the traders would indeed be exchangers instead of vampires they are currently. Nano lines as this would make the whole profession slightly more complex and interesting to play with. At the moment, they are indeed Skill Vampires instead of Traders.