If I am reading the information correctly, this will be the first non Epic ship to have a firing arc that isn't 80°.
Either all 4 quadrants will be 90° arcs- giving the Lancer a slightly bigger front arc than standard- or the front and rear arcs will be 80°, and the side arcs will be 100°. Given that, as far as I can tell, the ship will only be able to fire out of a pre- chosen arc, this will be something players will need to account for mentally.
(Yes. All of the Small and Large ships have 80° arcs, not 90°. And yes, even ships with turrets have firing arcs.)