This drama is pretty good especially the costume, props, buildings and backgrond scenary are superb. Character profiling is extremely good too
But it still have problems, most of which can be summed up to 2 points
- most girls being xiao love interest not only is wasted plotline but also undermines development and relationship of lot of other character
-the plot structure is very kind of messy and repeatative (foreshadowing and lores are not properly/effectively placed

If i go in plot detail, i would divide the show into 5 parts/arc
1) Beginning and individual journey arc (i.e from their parents death to the point before the two brothers meet each other)
Problems with this part include
- their parent died from suicide, which kind of undermines the the entire revenge drama. (Because biehe cannot be blamed for it, even though the show tries to blame him for it. If anything yao yue is more at blame than anyone else, but since it was suicide it still undermines the blame)
-hua wu que individual journey is extremely bland. Especially the lover arc was totally bland and partially nonsence and also were the worst episodes of the entire series.

2) Jiang Bie He arc (i.e treasure map +silver cargo arc, basically from the brothers meeting to jiang bie he being exposed)
Probably the best arc of the series, but still
-Problem with this arc is all the unnecessary love interest of xiao yu. Especially the fat girl is discriminated by narrative being fat, poor girl is discriminated by narrative for being poor etc. They dont really add much to the narrative anyways.
-Also especially in silver cargo arc, xiao yu character was kind of dumbed down for other to outwit him. He literally knows everything, but never uses that info in clever way.

3) 3 months to duel arc (i.e the part where xiao yu and ha wu que promises a duel in 3 months and goes on a journey with each other's master)
-This arc have the recipe to be a really good arc, since it has a lot of twist and turns. But is executed very poorly. Like for eg- hero lu was barely mentioned (like once or maybe twice), so it was more like his character coming for the twist out of nowhere or Mr tong's identity was too obvious and the was waste (if tong was lian xing instead of yao yue, there would have been support of emotional weightage for her action in finale and not to mention sight better attempt at surprise element)

4) wu ya clan arc (ie the entire thing that happened in and around wu ya palace)
-Next best arc after the second one. It problem stems from how 12 zodiacs were underused as group and how rat or su ying were introduced too late.

5)finale/duel arc
-The was almost perfect except for two minor problems. The members of 10 great villan's death felt forced and yao yue hallocinating jaing feng was not only disservice to jaing feng's character, but also empowerment to her stupid jelousy

Character wise-
-Xiao yu was quite a delight to watch since he is very expressive, but it never really felt like he was naturally getting stronger (even though he got those manual and even after the scene with being intelligent is not enough, growing strong is needed emphasis). He beating rat with his two days learned martial art was a joke tbh
-Hua Wu Que was way too stiff. He never showed expression like jelousy which should have been present considering the love triangle. He expression does get better towards the end, but it's was never upto mark.
-Tie Xin Lan for most part is ok for her role. She and hua wu que didnt have much chemistry is the only problem
-Su Ying and Jiang Bie He's only problem was they were not introduced early. While jiang bie was indeed introduced in 1st episode, it was like a 1 sec cameo image. His relationship with jiang feng should have been explored with some actual speaking role.
-Rat would have had a better role as tragic villan considering his backstory, appeareance and his daughter being heroine, but unfortunately he played out as petty generic hateable villan. He should also have been introduced early on considering 12 zodiac was major part of 1st episode.
-Yu Lang actor was extremely talanted but unfortunately material given for that character is too generic. He had a chance of played Redemption arc and showing he is different from his father (like how the yi hua palace sisters are different from each other). But he born and died as a evil with 0 character development like his father. Well, being killed by tie ping gu was the next best thing. But i wish tei ping gu learned about his hand in her grandfather's death to have some additional emotional weightage
-now coming to Murong Jiu and black spider. For most part black spider played as second fiddle to xiao yu rejected love interest and when murong jiu finally go her memory back, they rushed everything and skipped all the dynamics and development of their relationship
-zhang jing and gu ren yu had even worse. One min they started working together when murong jiu disappeared and next min he like her suddenly. There was 0 development whatsoever
-12 zodiac were very poorly used. They were never shown together or as group (which they were supposed to be instead of 10 great villans who were not a group, but still shown as group). They were placed randomly and killed one by one. Some were even killed in the episode or even seconds after introduction. Also the tiger and rabbit were forgotten at the end. (Especially tiger got forgotten is weird, considering his wife died with 10 great villans

Finally action scenes were ok, but this series need more action. Also action scene are scenary like instead of adrinaline pumping with stakes and strategies, So i was not really all that into it.