The current way that the chests are acquired is the following.
Run 1 of the monthly pass every Tier I Chest is a Tier I Chest and every Tier II Chest is a Tier II Chest.
Run 2 of the monthly pass Tier I Chests have a 20% chance of becoming Tier II Chests and Tier II Chests have a 10% chance of becoming Tier III Chests.
Run 3 of the monthly pass Tier I Chests have a 20% chance of becoming Tier II Chests and Tier II Chests have a 10% chance of becoming Tier III Chests.
My proposal is to make it the following:
Run 1 of the monthly pass Tier I Chests have a 10% chance of becoming Tier II Chests and Tier II Chests have a 5% chance of becoming Tier III Chests.
Run 2 of the monthly pass Tier I Chests have a 20% chance of becoming Tier II Chests AND a 5% Chance of becoming Tier III. Tier II Chests have a 10% chance of becoming Tier III Chests.
Run 3 of the monthly pass Tier I Chests have a 30% chance of becoming Tier II Chests AND a 10% Chance of becoming Tier III. Tier II Chests have a 15% chance of becoming Tier III Chests.
You get the gist. I feel like it'd be a more fun way of doing it as it would further reward re-runs of the pass and make every level a lot more exciting than they currently are.
EDIT: Some justification as to why I suggest changing even the first pass: I believe that it'd just make the pass more exciting at all times, instead of only from the 2nd completion onwards. A lot of people don't have time for multiple completions and it would probably be more fun for them to have a bit of spicy RNG in there. Not to mention the people doing 3rd pass+ getting some actual linear progression instead of... well, nothing.
Run 1 of the monthly pass every Tier I Chest is a Tier I Chest and every Tier II Chest is a Tier II Chest.
Run 2 of the monthly pass Tier I Chests have a 20% chance of becoming Tier II Chests and Tier II Chests have a 10% chance of becoming Tier III Chests.
Run 3 of the monthly pass Tier I Chests have a 20% chance of becoming Tier II Chests and Tier II Chests have a 10% chance of becoming Tier III Chests.
My proposal is to make it the following:
Run 1 of the monthly pass Tier I Chests have a 10% chance of becoming Tier II Chests and Tier II Chests have a 5% chance of becoming Tier III Chests.
Run 2 of the monthly pass Tier I Chests have a 20% chance of becoming Tier II Chests AND a 5% Chance of becoming Tier III. Tier II Chests have a 10% chance of becoming Tier III Chests.
Run 3 of the monthly pass Tier I Chests have a 30% chance of becoming Tier II Chests AND a 10% Chance of becoming Tier III. Tier II Chests have a 15% chance of becoming Tier III Chests.
You get the gist. I feel like it'd be a more fun way of doing it as it would further reward re-runs of the pass and make every level a lot more exciting than they currently are.
EDIT: Some justification as to why I suggest changing even the first pass: I believe that it'd just make the pass more exciting at all times, instead of only from the 2nd completion onwards. A lot of people don't have time for multiple completions and it would probably be more fun for them to have a bit of spicy RNG in there. Not to mention the people doing 3rd pass+ getting some actual linear progression instead of... well, nothing.