KDR: I don't know. I really don't think FPSers, specially competitive ones allowing players to have different control schemes that give distinct advantages.
People that play with the simpler "Metroid Demo" interface could never compete with a player of any skill with this new shoot anywhere interface.
And the shoot anywhere interface, will be awesome, but will also be hard to learn and potentially difficult to master. Meaning there will be a huge learning curve that will hurt the online competitive gaming for new players.
Really, it just depends on what the developer wants to create. For a Metroid game, the "Metroid Demo" control scheme is perfect...but for say Unreal Tournament or Timesplitters this new control scheme works well. Geist could fit in with the Metroid demo theme.
Giving the option means it will hurt competitiveness.