leaving the glideslope on short final, diving to the threshold
Imho any landing - piston or jet - is not done properly if it involves "a dive towards the threshold / ground". I understand how one can come in a tad low if the LDA is critical and one would rather put it down than flare, but the glidepath should still be more or less the same than during the approach.
I was - and still am - taught to "fly aiming point" down the runway and NOT dive. Ever.