Favorite Weapons appear more often

Armory

Sandbox or endless mode

Melee weapons could benefit from a block alt-fire

[Suggestion] Add multiplayer mode and additional co-op missions mode

Multiple save profiles (Idea)

Willy Wonder's upgrade shouldn't reroll affixes

Content

Additional Player Counts (via game modes)

STABBY STABS

Support for mixed input controls?

[Suggestion Multiplayer] Add option pause game immediately on level up

Different UI styles

Add Goku