Shaun Marsh - a ton.

[JonHenry]

They had bowled enough. Innings went 76.1 overs. Not as if they were fresh.

Why would you do it and risk your bowlers? What if they are tired and all end up bowling over 30 overs. With injury-prone bowlers, not such a good idea and just increases such workloads to such bowlers in a long, 5 Test Series.  Never a need to make a side follow-on, especially if there's back to back Tests (this Test was the 2nd of them so no issues). Making them follow-on is giving a sucker an even break, a chance to score 450 against tired bowlers. Then you might end up with a tricky chase possibly under lights. Why would you do it other than to have an extra day playing golf. If you're 215 in front a crape score will even put the game out of reach, as we saw. We won easily, as we were always going to do, and we have bowlers that are alot fresher.

Well based on those "facts" we may as well remove the follow on rule from the game.
A whopping 76 overs in 21 deg.
Oh hang on, around 10 were bowled the night before.
And they had just had a dinner break.
I think they may have managed somehow.
A new ball in those conditions may have just had them pretty fired up I would have thought