https://www.pcgamer.com/tekken-8s-unexpected-introduction-of-paid-cosmetics-is-splitting-fans-while-producer-says-players-should-update-their-thinking-to-the-current-environment-of-game-development/
The one thing that isn't mentioned is how these Tekken Coins will be bundled. Take Street Fighter 6's paid costumes: The skins Capcom added back in December cost 300 Fighter Coins, which is around $6 each. Except you can't buy bundles of 300 Fighter Coins. The minimum is 250, meaning you'd have to spend around $10 just to secure one costume. I wouldn't be surprised if Tekken 8 takes a similar approach, meaning that the actual money required to procure cosmetics is higher.
I'm kinda fine with cosmetics, because mods exist while allowing people to support their game and competitive scene if they wanted to. SFV had >$1000 retail price worth of costumes and I did buy certain costumes here and there, but for flavor of the month stuff there is always either a bootleg modded version of a costume (e.g., Chun Li SFAlpha costume) or straight up costume swap to override the default costume with the DLC costume if you are so inclined. Like I modded and swapped default Bison into the Halloween demon Bison, got a kick out of it, and a month later I uninstalled it. It comes with slight annoyance having to manage mods and files, but that's fine as long as the base game and character unlock DLCs are reasonable.