The reason they were so eager to catch Dyon wasn't only that he had left a blemish on their Viserion name, but it was also to sneak a peak at the Dragon Refining Arts! Because of the sensitivity and importance of the technique, not even they as elders could see the original so freely. Only when they cultivated to the 6th stage would they be allowed such a chance!
However, many were dissatisfied with this rule. They thought that there might be secrets in the latter stages that could help them see a more whole picture, and thus cultivate it easier. This was why they were truly eager. After all, the Dragon Refining Arts was estimated to be a Heaven level technique! How could they, who had only ever seen Earth techniques sparingly, not drool over the prospect?