If you watched the anime, then you will be able to see how they took pieces of all the best parts of the anime and seemed to mash them all together. I felt like there was no build up to any real "climax"

you don't get any of the build up from yusuke training with genkai, they dont build a relationship and so you dont feel sad learning about toguro and her history, etc etc. AND then randomly she gives up the spirit wave/orb/ power after 20ish days of training I believe... and if you seen the anime you know what happens after that.... but you cant feel sad since no real character connection

the dark artifacts are there and while they followed that storyline the most, it was a let down since even though yusuke met heie and kurama, he still doesnt build a relationship with them through the smaller missions before the big dark tournament.

The "dark tournament" was a fast pace battle, and even though the fights somewhat followed the anime with the final competition, it honestly gave no satisfaction to watch since there was NO BUILDUP. toguro and yusuke never fought before then and it was just "oh.... hes dead"

It was ok if you just want to see a live action recap of some good points in the anime.

Maybe they will make a season two that is longer, and maybe an actual tournament?