Some things still need tweaked. Here's a list of things I think need a second look:
* drop rates for rainbow Evo runes and shards. Right now th grind is insane.
* reduce drop rates of less useful materials (2 star and 1 star shards, runes, etc) at higher levels.
* sands of time. Either reduce level cost or increase the limit.
+ add ways to get sought after materials (like a challenge of some kind). Many games do this. Can be for sands of time or evolution materials.

* add more options in trooper store. This can alleviate ALL points above. Example: add Evo runes (with a weekly purchase limit) or sands refills (no limit) to the trooper store.
* add more ways to get skill shards. Or remove the weekly limit in the trooper store.

What do you guys have to add to the list?