For all we know it'll turn out to be her predecessor's suit, or a prototype she discards. I mean, YMMV comes into play anyway as I quite like the look of it, but I am a big mecha fan.
From Ellis' statement in the article, it looks like he's going to recreate that specific WSU feel, and while the mythology might be rebooted, I'm sure we'll have the familiar elements of the Comet, the Kherubim/Daemonite war, the Team/Gen expermiments and so on.
The advantage of doing this in a separate continuity is not being burdened by the greater DCU being involved. The Authority couldn't operate in the DCU as they did in the WSU, for example. An organisation like Stormwatch as originally presented (as opposed to the who secret war thing in the New 52) would change how the DCU works just by the very nature of their pragmatism and attempts to regulate superhuman activity.