SJR has one of the more peculiar battle systems in megaten, with it not really being recreated anywhere else, and that alone makes it worth playing
i also almost prefer the first-person dungeon traversal to the third-person style (though SMTV will probably change that for me), and this game has so much QoL compared to the original that after a while it really feels good to play
it also has easily the absolute BEST new game+ system in any megaten i've played, allowing a massive amount of customization on what you can bring over. definitely a breath of fresh air after the somewhat mediocre NG+ of IV and IVA, though there's not much content actually exclusive to SJR's NG+ besides some superbosses (which are very difficult except for the one from original SJ, by the way!)
i also almost prefer the first-person dungeon traversal to the third-person style (though SMTV will probably change that for me), and this game has so much QoL compared to the original that after a while it really feels good to play
it also has easily the absolute BEST new game+ system in any megaten i've played, allowing a massive amount of customization on what you can bring over. definitely a breath of fresh air after the somewhat mediocre NG+ of IV and IVA, though there's not much content actually exclusive to SJR's NG+ besides some superbosses (which are very difficult except for the one from original SJ, by the way!)