What do you mean by a cleaner progression system?
When I hit level 40, what’s the path I should be following? What direction does the endgame pull me?
Is it level 40 repeatables? Right now you are far more likely to get Vendor trash than anything even remotely worthwhile here.
Elite Quests? Why? The rewards are inconsistent and frequently not worth the skill the quests require. I’d say the rewards aren’t much better than regular repeatables, in my experience.
Legendaries feel like the only consistent way to gear up where effort more or less equals reward.
For me, I think the rewards for those first two stops need to be increased fairly dramatically to make them attractive options on the way to Legendaries. Repeatables should be a consistent source of high quality Rares and occasionally Epics. Elites should be a consistent source of high quality Epics and occasionally Legendaries. And Legendaries should always have good reward in Coin, Gear or EP.
I picture a fresh 40 using repeatable Cypress and Babylon quests to gear up and practice Macro fundamentals, then moving on to the harder Elite quests that really test your Macro but don’t bury you in difficulty from 2:00 in. Finally, that player, geared in a reasonable amount of Epics and a smattering of Rares and Legendaries is ready to tackle Legendary quests.
Quests should, in my opinion, always feel rewarding for their challenge level. I shouldn’t be opening Pine Planks on an Elite Cypress quest, or any grey vendor trash on a Repeatable. If the concern is flooding the game loop with too many rewards, I’d say increase the quality of rewards in the Repeatables and Elites, but lower the Qty of chests received.
Going from fresh outta 40->Repeatables->Elite->Legendaries should be a natural feeling progression encouraged by the games reward structure.
TL;DR: Make Level 40 Repeatables and Elites more rewarding for fresh 40s.