The new track looks like it has the correct size spaces to fit two wood ties between each pair of metal support beams, same as the old track. That will come much later though, it'll be after they fill back in the rockwork they had to tear out. I'm not sure whether these beams are bolted into the track structure or the rockwork, possibly the latter or both depending on the area. They have actually removed and replaced quite a lot of these wood ties over the years, presumably as they've rotted out. I know it went without some of them when the ride was being neglected heavily (even moreso than recently) in the early 2010s. Pretty sure replacements can even be done overnight.
As for the track color, I also wonder what they intend to do. I believe it's actually possible to paint coaster track even on site after it has been installed. So I suppose that's plausible. That said, it's possible they intend to just let it age naturally and develop a bit of surface grime and rust on its own. Most of the track structure below the rails and connecting crossbeams is going to be covered by the themed elements such as the rockwork. And the supporting crossbeams will also be somewhat offset and obscured by the wooden ties. They could also add some paint and fake weathering on these beams too without issue. We'll see. Things do weather on their own pretty fast in Orlando.
