Arena-torunament or BG-tournament?
Of all changes I've seen here on AT/Blackrock needing honor for transmog is clearly the worst. By requiring honor to unlock transmog you are simply forcing players to queue up for BGs instead of arena to gain access to transmog. That's opposite the purpose with this server, which is to play arena (obviously, right?). So, with the ambition to increase the server's population I'm afraid this might cause the opposite.
However, some of the tranmsog could require tokens, for instance transmog by ID. But for people who are here for only arena there has to be an option for them too, or some players will quit.