I was cautious about answering, but here goes.
Given the current situation around the immigration/deportation issue, I think the Tories are "fortunate" to have a non-white, talented and experienced minister they can slot into this role. I am sure Javid is well aware of that. No one is questioning his ability as a politician, but he is not being exploited by any means - if anything he holds the whip hand here. He is a politician who is on his way up, and would have moved into one of the "big jobs" anyway at some point soon, regardless of this episode.
Heard him speak once at an industry thing. He's a shrewd cookie. Typical politician. Typical fucking tory.