Also, if you don’t override the AB system during deceleration,
AFAIK maximum brake pressure will continue to be applied even after you have come to a halt, having the same effect as a set PB. The difference is that if it subsequently disarms for any reason and you don’t notice, you might start moving unintentionally, so deliberately applying the PB makes no difference to temperatures, etc. but protects you from that scenario.
Unless the cause of the RTO is immediately obvious and carries no particular adverse effects, even at low speed my plan would be bring the aircraft to a fairly rapid stop on the runway and make a thorough assessment. There have been numerous cases of severe failures where there has been little or no flight deck indication of a problem but a catastrophic time-critical event has begun. 737 at Manchester and 777 at Vegas come to mind straight away...