I’d like to post here this info to warn all pvp players.
After reading the RtL bug (losing HPs from water line on morphing self), I wondered if this would be the same with other morphing, offensive skills.
I just tested with the help of a mesmer on my thief: as soon as he used Moa Morph on me, I instantly lost the 2k HPs I had from Acrobatics line.
I didn’t have the time to check other bonuses from the other lines (like toughness, healing power, cnd dmg, etc.), but I think that’s the same: as soon as any player is morphed, he loses all the bonuses associated with trait lines.