The thing with Miller for me was you saw enough great plays to make you think he had the potential, and just needed the reps. I said all along the guy was a BEAST in college at breaking up zone entries--one of the absolute best in the country. So, it's not surprising to see once he adjusted and gained in confidence, that he is showing the same in the NHL. He also really excelled at controlled exits and entries in college, so it's only a matter of time before he takes off there, too (we've already seen some of those rushes that he's so good at with his speed/strength/reach combo).
He was given A LOT to do as a rookie.
Top 4 minutes straight from NCAA with zero training camp. Under normal circumstances, its very possible that he would have started in the A.
I never really understood the hate that he got last year. Yes he had some shit moments, all rookies do but it got to the point where he would be blamed for things that weren't his fault (He got blamed for a goal against at one point that he wasn't even on the ice for!) Its even carried over to this season and there are still a group of fans who cannot wait to jump on him when ever he makes a mistake.
Glad he got all of those reps last year though because it paid off this year. His entries and exit numbers will improve dramatically if Gallant lets him loose and allows him to rush the puck out of his own end. Hes not bad passing it out, but he will be much better if hes able to skate it out and carry it in or skate it out and then pass it as hes moving up ice. He hasn't truly been "unleashed" in that regard and Im sure some of that is due to his own reservations, but they need to encourage this to become a thing. Trouba kind of carried the load between the two of them when it came to pushing pucks up ice (and did a decent job during the RS, I don't know what the playoff numbers looked like.) There should really be more balance there, if not a heavier shift towards K'Andre doing the work.