I may (well probably
) be too far beyond my primitive knowledge level but I think the issue seems to be the transition from autothrust to manual thrust, specifically in respect to thrust levers which are not backdriven.
So, when changing to manual thrust one has to move the lever back from climb detent to find the level where the levers would have been had they been "normal" driven levers, then add power, then reduce again? Is this actually the case? Not an ideal proposition at 50ft if so...
Hence I think folks are saying that switching off the autothrottle much earlier is the way to go - keeping the PF much more "in the loop" - and not scrabbling to switch from one mode to another at the last minute.
I await correction!!