I think like any player and coach, you get a better basis for judgement after 10 games. And we need to remember that the PL and the Championship are very different leagues.
With regards match fitness, as you say Standaman, it's something that's hard to prove or disprove. Will playing 60 minutes improve fitness levels? Maybe if the player gets regular starts, but a start here and there won't add much. But personally, I think players are best trained to run for 120 minutes, rather than 90. That way you can last, rather than start tiring by the 70 minute mark.
I think Holgate has been a superb signing. His quality shows and is arguably the best right back in the league. He has pace, a lovely first touch, a good shot and can hit a beautiful diagonal ball. One thing I appreciate is that he clearly makes an effort to applaud the fans before and after the game. He seems as though he enjoys his football and it shows in moments like this.