Two suggestions for poison;
- Make it last longer than a mere three rounds after coating chosen weapon with it (I suggest ten rounds)
- Allow creature weapons, such as those wielded by lycans, to benefit from it - similar to how Flame Weapon does.
I find the first point quite appealing and I doubt it would hurt. Poison is rarely used by PCs as it is and maybe seeing it a little more would be nice.
Though coating your claws or whatever in poison before entering a battle where you will likely receive wounds sounds kinda unwise. If its made possible I would suggest a check vs. poison for every time YOU get hit. Additionaly a higher dc for applying the poison than usual might be good as it would be atleast a bit harder to apply it with your clawed hands.
I believe you can only poison piercing weapons and lycan claws are slashing. Also, failing the check doesn't poison the user either way, Bioware forgot to implement it in the game and only did so in the notes. ;)
Perhaps more exotic poisons are needed?
All things that cause slow'd movement, or spell failure.
A rare paralyzing poison or perhaps add some that cause fear.
It really does look like poison could use some help, how ever that might be actually done. (And the only non-piercing "weapon" that can be poisoned is indeed sling bullets.)
Slashing and piercing, VP.
And yeah, applying the poison DC to the user if he's coating his own claws sounds fine.