It would be a good pair because they would not only spend more time in the OZ and actually get shit done, they would also snuff out rush chances before they cross their own blue line.
It's like
@Machinehead has said, if you play him with Fox, Fox can pass it out when necessary and Miller can skate it out otherwise. Considering the role/matchups and minutes, being Trouba's partner is probably the hardest job on this team.
Also if you don't like the whole point shot when its not there, that finger should be pointed at Trouba before anyone. Dude does nothing but try to hammer away on pucks that have no chance of getting through.