Clarification on the antiskid wheel pairs issue
To my understanding having asymmetrical release of brakes during touchdown (wheels 2 &4) or touchdown/hydroplaning (wheels 1 &3) functions of antiskid system creates an effect similar to differential braking (to a lesser extent) that can veer the airplane to the direction of the outboard wheel that is not released. I'm an engineer not a pilot so I don't know if the result of releasing a pair of an outboard and an inboard wheel is negligible or not in real life. My concern is mainly theoretical. I suppose only pilots that have landed while stepping on the brakes without autobrake selected on can say if the effects of asymmetrical wheel brake release after touchdown function activation are noticeable. Perhaps there is no issue as most probably any of the two antiskid functions activates immediately after touchdown when the traction is minimal.