Just spent a few minutes reading the alleged Rouge One spoiler ship thread.
Here's a spoiler for you: it's all speculation.
Not that speculation is a bad thing. What fan doesn't like to speculate on the goodies to come, and how much more fun is that when you have a community to speculate with. It is one of the reasons the forums exist. I am all for that.
In the breadth of that post someone noted that the proposed Tie Striker was listed as an aerial ship - meaning that it was capable of maneuvering in an atmosphere.
What was interesting was the aroma of a false dichotomy in the thread - the notion that if a ship is an aerial ship, it cannot fly in space.
Hogwash! If you prefer more a more philosophical interjection, I could say, "False Dichotomy!"
You don't need to memorize the formula for shear stress to know that an aerodynamic signature is designed to reduce that stress on a framed associated with atmospheric resistance. In the vacuum of space, most of your shear stress arises out of your own momentum/inertia, since there is no atmosphere to contribute to the stress. That means you can design a space-only ship that would tear itself apart in an atmosphere, but would have no problem in space.
Frankly, a regular tie fighter would tear itself apart in an atmosphere the first time it attempted a hard turn (think of holding onto a sheet of plywood on a windy day, and you get the picture).
So when a vehicle is identified as an aerial striker - we understand that to mean it has been designed to function (aerodynamically) within an atmosphere.
But that doesn't necessarily mean it cannot fly in outer space. It just means that it won't tear itself apart in an atmosphere.
In the case of the striker in question - it has the standard Tie solar panels, suggesting that it can operate just fine outside of an atmosphere, so whatever they intend to say by naming it an aerial striker, there is no (good) reason to assume that this means it cannot fly outside of an atmosphere.
That's what I think at least. It's like a spaceship with dual citizenship - it can fly in space but was designed to fly effectively within an atmosphere (unlike other ships which "could" fly in an atmosphere, but would be severely restricted in their maneuvers due to wind shear, etc.)
TL'DR: Aerial capability doesn't necessarily limited a ship flight within an atmosphere.