Riot still doesn't know how valuable mobility is.
are some current big offenders
has been less popular lately but still is ridiculous
is disgustingly difficult to catch and reduces many champions viability against her to extremely low levels
and
get to have mobility, damage, and (near) invincibility all in one ability
These champions can dodge and weave far more easily than so many other champions while still dealing ludicrous damage. If you have that much defensive/offensive mobility then you need to have lower raw damage and tankiness than the competition.
Discuss.