Yeah that's actually true,Shu And wei was like dog and caat,And wu was like the Fish unable to do anything and is just the background.Im not sure about the battle of Yi ling because It was Lu xun Who actually started the fire in Shu's camp (historically happened) Though.I can't remember if this was the last battle Liu bei took part in,As this is what im refering too
Yeah,It's A proven fact that they played the Japenese game "Go" near enough everyday(If their free) Dynasty warriors Portrays them as a Generals who do anything they want and do as they plead,Though some of their Personality's are Quite accurate(Not all)
Zhang Fei Wasn't the drunkard that they described him,He was short tempered i'll say that now but he wasn't that stoopid and Obeys Mainly Orders from his Brothers.He was strong.However like you said,In DW Guan yu Wasn't seem as that much but he was infact very clever.
The Downfall of shu i'm guessing began from Fancheng,Guan yu died(Though historically he didn't die from the battle of fancheng he died after another battle after he retreated from fancheng i can't remember the name of but it's something like "Ma."Then captured and slain alongside with Guan ping)Zhang Fei was late for the battle,I think and Stopped for a break and slept,However,It was his two allies who killed him and defected to wu but soon tried to come back which was stupid.Though Fancheng never would have been avoided as Jingzhou was in between all 3 kingdoms.I know that Fnacheng started as Shu promised that they'll give back the land but never did,Plus Cao cao Didn't like Guan yu as much any more anywayTo get back at guan yu.And many people im guessing hated him and liked him(Im not sure).
But think about it this way,2 of shu's best generals were assassinated in i think 1 year,Losing Morale.Well i need to go i need to go bed now but i'll finish later