I reckon these factors do quite significantly outweigh the 1 extra year. Being from a rural background (but not applying as a rural), who moved to a city in year 10, i really would prefer a city and so UNSW, over the risk of Armidale, or Orange, especially considering the immense uncertainty with their selection processes.
Adding to this, if a person is rural, or even a local applicant, UNSW is kinda the only university in which you can 'bank' your trust in getting an offer. A student with 99.95 and 3300 ucat can 'pretty much' (yes yes i know this is with the assumption they dont do a big oopsie in the interview) be certain they will get an offer at UNSW, whereas if they put down JMP or WSU, the 100% and 75% weighting on an interview really would scare a lot of people away. Its so uncertain that i personally dont want to take that risk. Bringing this back to rurals, if I applied as a rural, I'm pretty sure i couldve walked into unsw with my eyes closed (so long as i didnt flunk the interview), so if i extrapolate this onto other rural students, i feel like anyone who gets >85%ile or an >99 ATAR would much rather the weighting split of UNSW, rather than the 'up in the air' aspect of JMP and JPM.