I mean did he try to just daisy chain them? He claims that he wanted to use DisplayPort 1.4 for connectivity. But the monitors do support daisy chaining over thunderbolt, and he also states that. But why not daisy chain? I mean I get that it's frustrating to get the thing working with DisplayPort, dongles and docks. But the best solution was right in front of him?
I suppose it's the common knowledge that Mac OS doesn't support MST properly and author assumed it applied to Thunderbolt docks as well. This is on Apple for not implementing that, because it's not the hardware. Intel Macbooks work perfectly fine with regular DP Alt Mode docks in Boot Camp.