there are several gadgets and star powers that were replaced or removed from the game, maybe they can get them back
Gale (Star Power)
Second Wind
Tick (Gadget)
Backup Mine
8-Bit (Star Power)
Extra Life
Bea (Star Power)
Honey Coat
Gene (Star Power)
Pat on the Back
Mr. P (Star Power)
Tin Can
Poco (Star Power from beta)
Swan Song
Mortis (Star Power from beta)
Creepy Harvest
Piper (Gadget)
Auto Aimer
Darryl (Star Power)
Rolling Reload
there is a video on youtube and official wiki info showing these removed star powers and gadgets