2 Firepower didn't seem to stop players from using the TIE Fighter. or the Z-95 for that matter.
That's because they are 12 points and are the most efficient fighters for their respective factions, your investing alot more into an a-wing.
When your paying 25-30 points you want more than two attack, x-wings and b-wings come in cheaper with better firepower as do shuttles tie defenders and interceptors.
It's fast and agile but not very killy and will pop fairly quickly when the inevitable green betrayal happens.
Ain't that the f*ckin' truth... I think a rear firing arc and a barrel roll would make it incredibly deadly though, even with 2 firepower. It'd have something the Interceptor didn't as to where the Interceptor would have extra firepower.
That way they could actually be rivals, as they are in the established canon.