Old Fella,
Nothing wrong with landing with engines back at idle if speed is correct. Doesn't matter whether it is a 'straight' wing or a 'swept' wing, they both need the approach speed to be correct.
If you mean doing the approach and landing at idle, you're mistaken. Every jet operator I know of has a strict stabilised approach SOP which requires the aircraft to be between Vapp-5 to Vapp+15 (or less) and stay that way from 500ft AGL (some 1000ft AGL) to approx 50ft on the 3° slope. There is no way in a modern jet one could be stable and remain so at Idle.
Anybody who seriously thinks idle descents to
touchdown in a jet is feasible doesn't fly jets. "Gliding in to land" means idle power until 500ft at the very latest.