I'd like to make a comment, perhaps a significant one, but not being A320 rated need to ask the following question first -
Do your engines have multiple thrust ratings, as well as Flex, or is it just Flex from FULL T/O Thrust only.
I would appreciate an answer. My response, if the engine does have multiple thrust derates (TO-1, TO-2 etc.), relates to possible loss of directional control.
Regards,
Old Smokey