Feet at the bottom or up on the pedals is another big debate amongs Airbus pilots. in our SOPM, feet must stay at the bottom as we had an incident where a fo applied braking during take off. But lots of pilots including some instructors don’t follow that rule. Apparently according to an Airbus meeting they recommend feet up. That’s what an instructor told me. I have no documentation about it. But I also read in one of our old safety magazine Airbus recommended feet at the bottom lol.
In the CBT, it shows feet up on the pedals tho.
I keep my feet up also as I like keeping the same position for take off and landing. I used to keep them at the bottom for the reasons you mention. I guess unless it’s written black and white, it should be at pilot choice.