Warp Prism
Movement speed increased from 2.5 to 2.953 (previously 2.5 to 3.375.)
Acceleration increased from 2.125 to 2.625 (previously 2.125 to 3.25.)
The Gravitic Drive upgrade has returned to the Robotics Bay and will increase movement speed to 3.375 and acceleration to 3.25 when researched.

Hellbat
Attack damage decreased from 18 +12 vs. light to 18.
The Infernal Pre-Igniter upgrade increases attack damage from 18 to 18 +12 vs. light.

Banshee
Cloaking Field research cost decreased from 200/200 to 100/100
Cloaking Field research time decreased from 110 seconds to 90.

Without the Speed upgrade, the warp prism is too fast. Even now, it will be the fastest transport ever with unlimited carry size if u include warp gates. Very few units will be able to deal with them.
Hellbat testing is somewhat expected and allows 3 shot. It encourages more use to Servo Transformation and Infernal Pre-igniter upgrade since Hellbats now benefit from it.
Banshee = more OP rush and will be thrown away once its use is done.