From reading and own experience as well, my feeling is that the great hunt is an added value as you can battle against other active players in your range and get back to basics of bitefight. The best would be to make it a weekend event whereby every month/2 months the different domains are mixed and you can face other opponents.
Having it active for too long will just result in a lot of attacks whereby the regular players are in the forced to quit the game as they cannot play for 9 days.
Compare it like fishing and always catching the same fish (or even not catch the fish - i.e. no gold)...not very pleasant for that fish and to be honest neither for the one catching the fish, at least if it is every day. You need to ensure that people can grow and can now adapt to other players to become competitive. This is of course if the great hunt would become a more regular event.
For the players that think that always hitting the same opponent is funny, there is always another player that can win from you...no one is untouchable in bitefight