Yi can be effective with simple right click and Q commands; however, his kit actually has a lot of nuances that puts him ahead of "simple" champions such as
.
Yi's Alpha Strike can be used to dodge abilities, even ultimates, when timed right.
Mediate can be cast in a clutch to avoid serious damage, or reset Yi's AA animation so he can AA twice in quick succession.
Wuju style may seem simple, but Yi actually loses out in DPS if he has to fight after the active wears off. Yi needs to consider if he should activate it for a short burst of DPS or save it for its passive. If Yi can get resets off of High Lander, then of course this won't be a problem.
High Lander looks pretty straight forward, and it is. However, if Yi fails to get resets, he essentially screws himself over.
Yi's abilities have powerful impact, and are simple to use. But if used incorrectly, they come with serious draw backs.
Compare to
or
for example, they are mana-less and their decision flow chart is much simpler because their abilities don't punish them as heavily as Yi's do if they misuse them.