A good day's cricket. Obviously England have the upper hand, but it's surprising how closely the two innings have mirrored each other so far. With Bavuma at the crease, and de Kock and Philander to come, (and Maharaj can bat too), South Africa are clearly capable of getting near or past England's score from this position.

Moeen. He always seems to be one of the players whose place to the side is questioned (including by me), and he always responds with a performance like this that shows just how valuable his allround contribution to the side is. I think that as long as he, Bairstow and Stokes are in the side there will be questions about where he bats, but I think yesterday shows that you really need to sort England's top order out rather than worry about details - all three of those can bat anywhere from 5-8.
Thank goodness Dawson was picked because he can bat at 8. And of course, he's going to be primary spinner. Oh, wait

(ok, I'm being harsh to judge after one day, but given that the pitch is already starting to turn, you'd expect him to be heavily involved in the fourth innings. We'll see if two spinners turns out to be a winning tactic after all).
re: Stokes, I'd be the first to agree that he was picked too early, and on potential rather than true merit. He dined out on that century in Perth for quite a while, and was only really in the side because England lost so many other players at once. However, since the start of 2016 he's more than deserved his place in the side on merit with both bat and ball. To focus only on the good fortune he has had comes off as somewhat churlish - you don't average 45 with the bat and 27 with the ball since Jan 2016 simply by being lucky. Besides, it depends what counts as luck. If you include having a catch dropped, a close lbw umpire's call verdict that goes your way, edge through third slip when there's no third slip in place, bowled off a no-ball, etc., then I'd argue it's a pretty rare innings of any substance that does not involve any degree of 'luck' somewhere along the way. Root was dropped twice (including one pretty straightforward chance by Duminy), and stumped off a no-ball, on his way to 190, and I lost count of how many times England managed to drop Kohli, or otherwise stuff up a chance to get him out. We don't call Root and Kohli 'lucky' players - we acknowledge them as very good players who take advantage of luck if it comes their way to punish the opposition.