Regarding sales I posted them in my previous post.
As someone who has been playing Tekken since the first game, I know perfectly what I am taking about. You are focusing selectively on some tiny CGI segments which are, btw, consistent with previous installments such as Tekken 3 and Tekken 2 (and even 4), and you ignore fully the gameplay and how exaggerated Tekken 8 is compared to everything that preceded it.
In addition all new characters up until 5, were mainly humans and based on martial arts. Since 6, new characters were mainly based on imaginary anime characters and fighting styles, magicians, mutants, and waifu anime archetypes.
The initial reveal trailer of Jin vs Kazuya proves how you can have a Tekken that strikes the perfect balance of realism and exciting high energy fighting, with identifiable fighting styles without sacrificing anything, and without super powered exaggerations that are more fitting towards Dragon Ball, KoF or SF
Move forward to the actual game and Jin is basically a Super Saiyan Son Goku (even in base form) who can pummel Kazuya in human form into a skyscraper without a scratch, Kazuya is Lord Beerus who can shoot huge Kamehamehas out of his eye that can level New York to the ground, Nina uses Uzis as part of her main moveset instead as a humorous non canon Easter egg customization, Victor looks like he came out of Metal Gear Rising, he is a weapons warehouse against unarmed hand to hand martial artists that makes even Yoshimitsu look naked etc. It is a mess.
But the gameplay is top notch which is what it saves it.
Tekken 5 gameplay and characters are no where close to the exaggerations of Tekken 8. The final game goes above and beyond the reveal trailer which was perfect