Two separate themes are now being discussed:
ENG FAIL on final (stable with increased thrust/ power applied)
Unstable approach with decision to G/A
Unstable approach with decision to land
OEI to G/A : usually by attempt three, students are getting the idea, with improved technique.
Landing longer than ideal is invariably a function of speeds exceeding Vref+5 on final. Adjusted Flare height & landing pitch attitude selected also critical.
If the OEI was occurs prior to the approach, then flap15 is often used (depends upon ac spec) with higher approach speed. Visual clues subtle changes & increased LDR.
What you can "get away with" is often a function of ac mass. Inertia adds to the mix and is a critical factor.
Let us put this discussion to bed & move on.............