Where do I start lol.
It's a pain in the arse for people from large parts of the city to get to, especially if they have to come through Civic. In saying that, the public transport options at Epic are probably better than Bruce TBF. It's also right on the tramline, not that that means much in reality.
Aside from a Macca's and a petrol station on the eastern corner there's basically nothing there. It's basically a show ground surrounded by suburbs with an industrial area to the north. There isn't even as much space there as it seems because large parts of the area are protected nature reserves and you'd cause all sorts of issues if the stadium impacted some of other events that are held there as well.
The people in the suburbs that border it are also notorious nimbys that cause a stink every time it's proposed that another event is held there. They piss and moan about Summernats, the Show, and other annual events that draw a crowd every year, and they'd fight the construction of the new stadium to the end and whinge about it's existence forever.
Their whinging alone almost doesn't make it worth it lol. I'll never understand people that move into an area like that knowing full well about the kind of events that are held in Epic then whinge about it like it's some kind of imposition, but I digress.
TL;DR, it's got almost all the same problems Bruce has but worse, and there're other potential options that would be better.