The 181st fighter wing, under Evir Derricote, was a squadron of rejects and those who had fallen out of favor with their superiors. This "One Eighty Worst" idled away, waiting for Command to find a mission both embarrasing and lethal enough to finish them off once and for all.
This changed after Soontier Fel was assigned to Evir's command. While he was training them into a fighting force to be reckoned with, Derricote covered up the evidence of their improvement, to avoid drawing attention from their political enemies. The 181st officially became the elite squadron we know today when Soontier led a victory against a rebel fleet on the same day the DeathStar was destroyed at Yavin, and the Imperial propaganda machine latched onto his achievements to avoid talking about Tarkin's misadventures.
The 181st survived Endor, and even invited Maarak Steele into their ranks- The Tie Interceptor may be a step down for the noted pilot, but surely flying with the likes of Soontier Fel and Turr Phennir was worth it.
Taking a page from Heros of the Aturi Cluster, this title gives Tie Interceptors a single Focus token per round that nothing can stop them from getting. For a ship as dependent on fickle greens and re-positioning as the Tie Interceptor, a big reason Push the Limit is considered so essential to the interceptor is focus. Of the existing Intercepters all of them benifit from this, but Kir Kanos can now tank up with focus/evade, and if ignored, turn that into a focus and an extra hit, at least at longer range.
In addition, those trained by Soontier Fel resist falling prey to stress. Lt Lorir and Tetran Cowall (who studied for the role) both benefit from the removal of stress from their abilities, and all interceptors have at least the gamble for a white Kturn- and if you're not a gambling person, the Tie Interceptor is hardly the right fighter for you.
On the other hand, the Red stripe of the 181st has no place on a Royal Guard interceptor, competing for the Title slot, and Soontier Fel himself will actually fail to activate his ability half the time, due to his stress being canceled before he receives it. Though he can actually have a deeper token stack than he could with just PTL,having to choose between Autothrusters or the 4th defence die makes him vulnerable to the 4 and 5 die attacks that are showing up, that can simply overpower his 3 green dice.
The 181st's ability to manage stress also plays into another option for all Ties...
vs old version