If it's just a talent, we're going back to the original situation; all other weapons get abandoned for Tenebrium only. Why would you spend 15 points on, say, 2-handed weapon if you can do the same damage or more for absolute free!
So it makes absolute sense to have it a cost, paid in points. Also you seem to scoff a 33%(!!!) increase in damage as being useless. What?
That's not even taking into account that regular damage has easy resistances all enemies have, and tenebrium is pretty much full damage on all enemies, and the damage easily scoffs over +50%.
So no, I don't think it "only" adding so little bonus damage is a bad thing...
So then it comes around 'it's not useful beyond 3 for boni'... which also raises the valid question that a LOT of skills this isn't the case. Most magic top out at 4, repair is best at 1 and I probably could list a lot more if it wasn't so long since I actually booted the game 0_o
But no, I can't be sad that overpowered Tenebrium got reduced to what it always had to be. We all knew this was coming anyway...
