Omen? Fragile? ...Are we playing the same game? Sure, it doesn't have much armor or hull, but it has an exceptionally strong shield; the thing is more durable than most destroyers (and far more capable of backing off to vent).
Granted, it got a very efficient shield emitter, and its flux pool isn't really bad either. But no matter how efficient its shield is, the Omen is still just a frigate. Sudden KE bursts (like Needlers) will rip its shield, armor and hull in a blink.
I couldn't find a proper build for an attack Omen, however i found the EMP emitter very handy for escort duty. Unfortunately, escorts usually have to soak up a lot damage in battle. Centurions, Brawlers and Monitors are properly equipped for this job. The Omen? Not so much.
With the new changes, the Omen will at least have a bit more armor to survive a few more KE shots. The 360° shield will also increase its survivability against attacks from multiple angles. The increased flux cap is a nice bonus too.
Probably not a competitive choice for the late game, but could have its uses for early/mid game now.