Geez, I've been wanting separate leagues for like EVER! So lets do this!
Hopefully, each league will come with the opportunity to earn a small amount of packs for the best player(s). (even 1-3 packs is enough)
Maybe allocate
1 pack for Bronze
3 packs for Silver
5 packs for Gold
10 packs for Diamond
And the balance goes to Champion
The value of the game isn't in reward cards but rather cards that make you feel like you are growing your deck. I really missed this when it was taken away, and i suspect it'll improve the new player experience even if they are competing with bots.
Anyway I'm looking forward to these changes when they hit the ground.