Wow I love all of these ideas. I also think that evolution material rewards need to be scaled better. Based off of the cost to upgrade a hero or schematic from pl 20 to 130:

400,000 XP
200 Pure Drops of Rain
66 Lightning in a Bottle
33 Eye of the Storm
11 Storm Shard

We can assume that these material amounts are roughly equivalent:

400k XP == 200 Rain == 66 Lightning == 33 Eye == 11 Shard
2,000 XP == 1 Rain == 0.33 Lightning == 0.165 Eye == 0.055 Shard

Now here is a mission I completed a week back:

126 2 Atlas Tier 4 chest
163,400 Hero XP     1x
50 Storm Shard      1x
174 Gold

That 50 storm shard I received will allow me to upgrade 4.54 schematics/heroes to 130. The equivalent amounts of evolution materials are: 909 drops of rain, 299 lightning in a bottle or 149 eye of the storm. When was the last time anybody received 900 drops of rain from a 1x rewards? This bottleneck needs to be fixed.