Zeeo has a few non-combat abilities, but they add little to the experience. For example, you can use it to climb up special grapple points, which takes "zeeo" hand-eye coordination. You're essentially just watching Rianna perform a series of unlikely acrobatics. Give us some risk, please! Maybe a bit of danger? You can also unleash the droid into ducts to access computer ports; the only entertainment here comes from marveling at the ducts' lame, video gamey designs.
This leaves Lethal Alliance as a very typical, very easy, slightly sloppy Star Wars shooter. The targeting system is good once you get the hang of it... maybe too good. Shooting enemies is a snap, and so is dodging thanks to Rianna's talent for crazed flipping. Combined with a very strong shield, it's really pretty hard to die outside of the odd instant kill via pits. There's a basic ad-hoc multiplayer mode, but the gameplay mechanics aren't any more interesting than they are in single-player.