i think i finally found out the problem with riven
she has way too many build paths. there's not a single fighter item that doesn't give attack speed she can't buy. here's a list of the different build paths she can take.
crit (
and
)
lifesteal (
,
and
)
armor pen/lethality (
,
,
, and sometimes
)
her cooldowns are also extremely low considering no matter what build path she takes, she can easily get 40% cdr since all her builds consist of items such as: , , and , and if she doesn't get enough CDR from items, she's gonna get it from runes. (cosmic insight and scaling cdr stat).
considering riven is a "high skill cap champion", her skills are misused sometimes by even the best riven players, but her seriously quick potential to get max cdr + her really low ability cooldowns, she barely gets punished for missing a w or being too far away on her last q.
i think riot can fix this by possibly reworking her passive, making it rare for her to pick items such as crit strike items and duskblade.
tl;dr: riven can build too many items, rework her passive to fix maybe