touching down abeam the gs antenna is actually tough. really good pilots, willing to smack it on can do it.
most can't. and they land a little longer...around 1500' down the runway (narrowbody).
there is a way to reduce speed and blend the flare just right to stay on GS and touchdown abeam the GS antenna...but you have to actually know what you are doing. see the book, "stick and rudder" and the ''stall down landing". You have to be really sharp in a jet to do this.
better a tiny bit long, than ducking the gs and ending up short