While it is late, this game, despite all of it's flaws, is still worth it to buy and play it
Time of development:
(10 month at max)
Intention:
(Returning to it's roots)

Graphics:
It is simply... (great looking with a define art style inspite of it's suppose to be fully realistic), it really emphasizes the busy, urban and glaring scenery of the Red Light district that is Kamurocho yet also the serene, personal and nautralistic aura of Onomichi. Even the lighting and shading of characters emphasizes that with Kamurocho having much more colors, intense shading yet also more lights spreading around the character while Onomichi has more define colors, a more calm shading and even calmer lightings.
But the texture work is obviously blurry and has some quirks to iron out, especially Kiryu at times
Story: While story quality is subjective to a degree... this one I can confidently say this is a (very well written story up until the ending), as this is Kiryu's story... his last time being in the role of a protagonist and passing down the torch to someone else either Haruka or another Yakuza, someone that can catch up and not be abandoned by the modern age. And it is heavily emphasizes with the many call back to previous game but changed or twisted in ways like with the Saio Triad's more pragmatic, brutalistic and less graceful method in comparison to the Snake Flower Triad of Yakuza 1, the Jingweon Mafia's new transition to more esiponage and more... graceful method in comparison to Yakuza 2's Jingweon where they're primarily assassin groups bound to blood duties and the Hirose family being an obvious repeat of the Arakawa family of Yakuza 3 while also being a horrific twist of Kiryu and Kazama's relationship.
However... as I mentioned before, at the end is a little... questionable, I can't spoil it but let's just that this twist is the least personal thing Kiryu has ever faced and the absence or unimportances of previous characters may rub people the wrong way, especially Majima, Tanimura or Akiyama

Gameplay:
It (returns back to the classic combat style) that 1-5 has with a new set of animation, purposes and dynamics. It emphasizes on a more careful and the brawler-like combat style with a slower combat speed, block stun and more OOMPF with Kiryu's strikes while also having the animation set being more dynamic as for it to hit more peoples and crowds in more situations... Again, saying it doesn't has style switches is a very bad criticism as it is setting an expectation THAT WASN'T SET UP as at the time, 0 and Kiwami was the only game with them so we should judge it by it's own merits and while this combat system is a little... simplistic, the game is entirely designed around this one combat style and it shows with how well design and harder the fights are.
There's always a catch... this is a brawler-like evolution of the classic style's gameplay so people might feel a little off from that, it might become repetitive after awhile, the removal of weapon carrying is an especially strange choice that leaves the player not as much freedom even if the weapons are not as strong as your hands and... sometimes the block stun despite it helping you more then being a detriment by helping you know which move is a risk to do or helping you delay the move to force the enemy to accidentally open up to your palms, can get a little too slow or punishing

Mini-games: They're all (well-made with alot of variety), some has sub stories, some don't but all in all, they're alright and Mahjong is still everyone's nightmare... not much to say
There's not much to say about the mini-games really...

Overall:
(A very rough Yakuza games) but nevertheless, still worth it with how more compact it is