As the title says we could desperately use a solo play test room, ala warframes Simulacrum.
In this room you would be able to test three things on static enemies:
Heroes you haven't unlocked
Cards you haven't unlocked
And weapons you haven't unlocked (Including playing around with their builds)
(obviously also stuff you have unlocked)
The purpose: To let people make informed decisions with their hard earned gold (or purchased gold) and to learn the playstyles, strengths and functionality of weapons/raiders you dont intend to unlock but expect to fight in PVP.
(And to anyone playing Valeria who crafts the Earthing, dont make the mistake I did and ignore Exterminator, without pumping it up you cant oneshot hades troopers. So that was a nice little reforge tax right there since there where no videos or in game information about the fact)
