Yah I do know what you will lose in speed at 300 feet with an engine at idle....about 30kts if that. So yeah at 230kts if they had a spare second it might have been a nice thought to throw in shutting down that engine if u wanted to slow down. At 500 feet shutting down the engine from 210 knots the aircraft crosses the threshold at 160 knots.
As for the armchair whackers. Stabilised on glideslope with one engine at idle and one at 70% you get flap 2 and gear with full speedbrake you end up at 210 knots, with flaps flucutating on load relief. they did an amazing job without time to practice or setup for it being 20 knots past that a planned exercise in the sim.
As for the report. Read the ECAM message up on an FCOM/MEL. In the MEL it implies DONT FLY( yeah they are dispatched- but it sure implies how freaking serious it is). On the ground it says SHUT THE ENG DOWN and go home..... in the AIR its basically implies your eng is ****. No it doesnt say LAND ASAP. But the other engine was doing exactly the same thing but milder? who in the right mind would continue no matter what some egghead sitting in armchair is saying to you. He is on the ground your in the air. He got squeezed by being a young captain....and twice he was given ECAMS warning something was seriously wrong with a powerplant.
Final note EPR fluctautions but everything else is normal.
EPR IS POWER. So what if there is nuthing wrong with vibs or oil etc.....Your engine has having problems providing stabilised demanded power. If epr is screwy and everything else is wrong then you either have a powre control problem or a fuel problem. IT AINT HARD to work that out.