For me, the question isn't if the Braves will get to 2.4 million with the current team. The more interesting (and unknowable) question is would the Braves have gotten to a similar point without hanging on to Teheran, Freeman and Inciarte plus signing Markakis, Colon, Dickey and Johnson and trading for Kemp and Garcia plus rushing up Swanson?
The novelty factor alone of the new park brings fans in but only winning can keep them coming back. The reason for the above was to accelerate the rebuild and it didn't work at least not for 2017 and that has been reflected by the relatively small attendance bump.
I don't believe the Braves will get a significant payroll bump this offseason because the FO and the mouthpieces aren't marketing the offseason that way. We aren't seeing any " hey look at all these young players and with the Braves planning to be big players in the offseason 2018 is going to be really exciting!" That's not happening and it would be happening IF they truly expected to make significant major offseason moves.