Although Tekken 8 currently has a replay system, its replay system is the same as CS2, where it records the inputs of the players instead of recording it, therefore the replays are "recreated". With that said, the amount of possibilities such as adding effects during combos and choosing where slow-mos happen would be a great addition considering replays on the game are limited to 30, gets replaced by a newer one, and gets deleted every new update.