Luke Rowe

I doubt mechanicals made that much difference. He was not good enough on the cobbled climbs to do anything in the Ronde (as was the case in Harelbeke) and if he was good enough to be a big factor in PR then his attack would have stuck long enough to be part of the winning move

His best form was for the early season stage races - maybe a by-product of riding for a team that prioritises those races rather than the big one day races
Will he ever have any big result in his career? OK, maybe he's never among biggest contenders but weaker riders have won bigger things. He always looked to have enough freedom in many races but not enough freedom to focus on certain races so he always looked stronger when he was less free.
You doesn't have to win to be a important rider. He is strong as a bull. The perfect road captain for Sky.

He lacks the kick to get away on the climbs and the sprint for the final.. but on the flat, he is one of the best riders in the peloton. In this year's edition of Gent-Wevelgem he attacked from the peloton on the flat after getting dropped on the second Kemmelberg from the lead group. Not many riders can do that.

I don't know if he will win Paris-Roubaix but I'm sure he will podium it some day. Why isn't Sky riding Paris-Tours? With the new gravel tracks and soft hills, it's his best chance of a big win this year.