It's actually not more sophisticated, if anything it's simpler.
Here's how the Falcon 9 + manned Dragon would abort: the capsule would separate from the launcher as the escape rockets fired, meanwhile the launcher's engines would be shut down (cutting off thrust). The capsule would then coast through the atmosphere until it slowed down then deploy its parachutes when it had slowed down enough and float to the surface.
Here's one abort mode for the space Shuttle: the Shuttle continues to fly until the SRBs have burned out (there's little choice about that) and jettisoned, then the orbiter rotates 180 degrees so that it is thrusting against its direction of travel, the SSMEs continue to run until the forward momentum is cancelled and the vehicle is headed back toward the launch site, then the SSMEs are shut down and the ET jettisoned, the orbiter then glides to an unpowered landing at the KSC landing strip.
Or, how about this one: if the Shuttle's SSMEs cut out during flight then the orbiter rides along until the SRBs burn out, then they and the ET are jettisoned, the orbiter glides a bit until it slows down, then a hatch is opened and a rail is extended out of the hatch, the crew then individually bail out of the vehicle as it is traveling several hundred mph by sliding along the rail (which allows them to avoid hitting the wing) and deploy their individual parachutes, they land in the ocean and are recovered by a search-and-rescue team.
That's complicated, the Dragon/Falcon is utter simplicity.
Here's how the Falcon 9 + manned Dragon would abort: the capsule would separate from the launcher as the escape rockets fired, meanwhile the launcher's engines would be shut down (cutting off thrust). The capsule would then coast through the atmosphere until it slowed down then deploy its parachutes when it had slowed down enough and float to the surface.
Here's one abort mode for the space Shuttle: the Shuttle continues to fly until the SRBs have burned out (there's little choice about that) and jettisoned, then the orbiter rotates 180 degrees so that it is thrusting against its direction of travel, the SSMEs continue to run until the forward momentum is cancelled and the vehicle is headed back toward the launch site, then the SSMEs are shut down and the ET jettisoned, the orbiter then glides to an unpowered landing at the KSC landing strip.
Or, how about this one: if the Shuttle's SSMEs cut out during flight then the orbiter rides along until the SRBs burn out, then they and the ET are jettisoned, the orbiter glides a bit until it slows down, then a hatch is opened and a rail is extended out of the hatch, the crew then individually bail out of the vehicle as it is traveling several hundred mph by sliding along the rail (which allows them to avoid hitting the wing) and deploy their individual parachutes, they land in the ocean and are recovered by a search-and-rescue team.
That's complicated, the Dragon/Falcon is utter simplicity.