You guys forget, this is a driving TEAM. There can only be one ideal race strategy taken by one driver. The other driver must by default, have to take the less optimum strategy.

I think after being burnt 2x, McLaren realizes that they cannot have two alpha drivers on the same team at the same time. They will not be able to co-exist and ultimately destroy each other ....

Prost v. Senna = Alonso v. Hamilton

With that said, keep Heikki is the smart choice. He's a competent, consistent, stable and drama free B driver who's happy to serve his role.