Welcome to Airbus. You focus on seating position, but personally speaking that’s not such an issue on the Airbus. A wrong seating position in relation to the side-stick is very awkward and very obvious long before you start to move. The wrong rudder position can be more easily overlooked, but is immediately noticed the moment you start to taxi and fixed with a quick flick of the rudder pedal adjustment. It’s not as cumbersome as on the Boeing.
Also, as a typical Airbus pilot you will be making many micro adjustments of your seat and armrest throughout the day, without the need of further flight control checks.
When done sensibly, the control check during the taxi is no issue whatsoever, just like all the other tasks you do during the taxi. Occasionally I do the checks before taxi (very short taxi times, fog etc), but you really have to be sure that the tow bar/tow truck is disconnected to avoid potential trouble. It’s almost not worth it.