Not really, he's noted as being a political animal. He's going to change it in a way he thinks is better. Which includes multiple Slayer Runelords. This is obviously bad. I don't understand how people can say it's not.
Look, these all run together and seem to say the same thing: It's Thorek or the Runelords not sharing. But those are not the only options at all. The optimal solution isn't getting more runelords to die without passing on their secrets in the hope that new ones will be better about it, it's to get the Runelords not passing their secrets to pass them on, not lose even their knowledge as well.
This should be obvious. The best thing for the Karaz Ankor and the Empire and Everyone of the Good Guyz isn't dead Runelords, it's runelords with apprentices passing on their stuff.
If your answer to "How do we preserve the secrets of our ancestors" is kill the current generation so the nex one is better, your solution is terrible. Like, the High King just changed his opinion. Consider that.
Why isn't Thorek trying to convince them to pass on their secrets /find worthy apprentices, instead of contributing to the problem by killing what little Runelore is left? We should be trying to preserve Runes, not get those that carry them killed. This should be obvious.
This is a stupid, Grudge Dwarf solution. Don't help him.
And that's being charitable and not calling it an assassination attempt on his competition.
Remember, he is the rare politically savvy dawi.
The right solution is to convince them they are wrong, if not about the lost Karag, then about passing on the Runes. Turning them Slayer just makes the Runelore forever lost. That's only a victory for Thorek as he removes competition and makes himself and his students more prominent and indispensable.
That's not good for anyone, or the Waystones. Hell, by doing this we're removing the very people that may be hoarding said Waystone knowledge instead of trying to get it to work for us.