Yeah I think they are playing Game 4 totally by ear depending on the series score and who they've had to use. The worst-case scenario now would be that Falter goes today and Thor is needed in a high-leverage spot today or tomorrow, leaving a Gibson start for Game 4.
The names don't really matter though, the five-man bench was clearly never on the table. And between the extra innings game we saw in another series and now today's weather, it that caution was obviously warranted.
For sure, this does the Braves no favors either. Fewer favors even, since they are under more pressure today, and Strider's availability is still unclear.