Hardly a new idea. But maybe give a gold or 2 for every tier of diamond. It doesn't have to be as good as repeatable Byzantium (the last chest of a PvP league). Just something more then the 24 memories of battle and mist packets, and skirmish chests, which amount to like, maybe 3 gold. And even then, that's only because memories are selling for so much right now.
1,050 points in reward track progress isn't that much when you account that's about 5 ticks worth, also.
Don't get me wrong, I do play for the fun of it. With my guild-mates. I just get kinda deflated after I finish diamond. It's like "Oh, I was getting great stuff, now lame stuff". Where as Byzantium, while I never bother playing enough PvP to repeat it, I'd feel good about it, ~25-30 gold being a decent chunk.