True that Majka is riding quite defensively when he is a team leader for GT (he rode last year's Giro same way), but it is all in his head. After last year's wins in TdF and TdP he said, that he is much more confident and he is not afraid of attacking anymore, becasue he knows that if his legs hurts, guys who are behind/with him suffer as well. But it changed again after stage 9, when he tried to attacked but was overtaken by Froome and JRod, he tried to keep up with them and blew himself up. After that stage he again started to ride very defensively unwilling to take any risk. He already proved that he can keep up pretty much any tempo uphill, he just needs to convince himself now to take more risk and he will be a long term top GT rider.