That's a good point, but Unzue works in mysterious ways...Yea but nepotism and tradition should also mean Lastras gets a spot, he's been in the setup for 28 years (Banesto amateur from 1995 to 1997, Banesto/Illes Balears/Caisse d'Epargne/Movistar from 1998 to 2015 and in the team car since 2016) and is actually a good DS.
Much as though Txente's work as a domestique was revered, the guy is basically a driver with a microphone.