Zinoviev Letter said:Not only that, but his team is weak. Porte himself was Froome's most important domestique in a rather thin looking team. Porte does not have another Porte.
Nieve is a perfectly good enough climber to support him in the mountains. I'm not sure what else you'd be expecting in this situation. How many teams have a stronger climber than Nieve as their 3rd best in the team?