Meikleour,
This discussion is interesting and yes, system knowledge helps you avoid surprises.
AFAIK, if you're in ldg config at Vapp on a 320 (Vapp below 159 kts), almost impossible to get a TOO LOW TERRAIN. It has to do with Terrain Clearance Floor function of EGPW that takes into account the "Nearest rwy data" and not the one inserted in the primary + in lgd config at Vapp, Mode 4 of gpws is inhibited... Happy to stand corrected.
Flying visually and eye ball the runway should not be considered as
the best Hollywood airline captains style (sic)...that is the basic of the basics, even on a jet.
I never said how I deal with the situation either
Cheers