Didn’t see the missed stumping, but sounds like it was decisive. 

That game will be packed! 

Lots of things were

South Africa were a batter short so we potentially keep them to 250 if he takes that stumping

Lots of things decisive inhindsight

The loose first 10 overs from oz.
Bowling 10 more widespread than south Africa
The missed stumping
Bowling Maxwells 10th rather than giving starc his full allotment of overs
Cummins having an off day
Warner still getting his placement back (his timing and eye have been impeccable) 
Khawaja getting injured
Stoinis getting runout (probably also injury)
Maxwell coming in too early (not in great form and he has struggled before the 30th but even still if he gets his trademark 30 off 15 we win)

It took everything to go right for south Africa and everything to go wrong for Australia to lose by only 10 runs

Now we have some selection headaches with khawaja and stoinis injured

Wade and mitch marsh the probable replacements

Gday gb,
jaszyjim - Taped the whole match, just finished watching it & read all the posts. 
Good summary gb & injuries now make it interesting as we can bring in players from outside the squad.

The positives from our bowling - Lyon a standout; Maxwell bowled with good economy x his last over.
Question marks fielding; Not Finch's best captaincy; why was Smith only bowled 1 over; why was Maxwell bowled out.
With the quick's getting pasted, bowl himself a few overs. 

Positives from our batting - 
Warner's 122; Carey's 85 & Stoinis going OK before run out.
Negatives - Finch out for 3, before feet get moving again; Khawaja injured; Smith out for 7 before getting going;
Maxwell out for 12 playing all over the place, totally unbalanced & the tail not doing much.
Whilst SA took some brilliant catches, they have to be there to be caught.

So going against England in the semis is going to be fascinating.
Our quick's aren't performing, and too many of our batters are failing.
Finch needs to score runs against the top sides - probably won't happen as they will work
him over before his feet start moving.
Warner if he keeps going will hopefully be a shinning light.
Khawaja will be out injured & that could be a positive - Wade has been suggested? but is he a 3.
Smith keeps on failing & at the moment is a negative - move him up to 3, bat Wade at 4 & pray.
Bat Carey at 5 & if Wade plays who will keep? as Carey at the moment can hold his place
as a batsman.
Stoinis will probably be out injured, replace by M. Marsh. This will be a ? at 6 or 7
Maxwell will retain his place if not injured & bat at 6 or 7 but don't expect much from him.
As I keep saying, he is a slogger with no foot movement & is being found out by the better bowlers.
Bowlers will remain as is except for injury.
The other option will be to bring Agar in but replace who?

 How does Maxwell keep his place?
Carey remains keeper.
Poms will doctor the deck for the semi..place bets on it.

Gday D4L,
jaszyjim - nice to see someone finally agrees with me re Maxwell.
According to others, without him the team is not balanced?
Obviously the selectors are on the same page.
How can someone who has done little in the last 4 games balance the team - it's ridiculous.
Yes he can average 200, but only off 10 balls or so then he's out.
Toss him out & bring Agar in.
I find it so frustrating that the selectors don't face reality,
Maxwell's time in the international's ODI's is finished - face it & move on.

They can’t doctor the weather.
Iffy forecast.
Not sure which team will benefit

probably stoinis is replaced before maxwell. Although Maxwell hasn't had a good world cup, he's still a touch ahead of stoinis

Speaking of which stoinis is injured and mitch marsh called in

Wade confirmed replacement for khawaja. Wade gives us flexibility if we think the pitch is a road.