Indeed, a simple patch could have fixed that day one. There were like 3 or 4 versions before the console release. The first arcade one which was the most broken Tag 2 version ever. It featured several broken combos, one of them allowed doing Hwoarang unblockable mid-air after the tag. Then another version, it had infinite loops if you pick Lars, and a character with long wall combo carriers. Then Ultimate, and then the version we know. The problem in older Tekkens could be summarized as follows: they weren't used to bringing pro and very good players to test the game. It's either they didn't want to spend more money on that, or just in-house developers' ego for wanting to tweak their game themselves without any feedback whatsoever. Thus, broken combos and a lot of unbalanced stuff. Things have changed recently since they've taken the game seriously especially that they want to keep it as an E-sport franchise.