Ret's problems can be summed up in a number of ways;
-Too many attacks that hit for similar amounts
-Low sustained/High Burst; the latter of which is bound to CDs
-The class has become 50% caster/ranged in essence; a Melee kiter/a paradox
-Holy's OP'ness has caused Ret to suffer from Blizzard's constant paranoia about making it strong (something which is not reflected in other hybrids such as Druid)
Not holding out for a serious solution for Ret until the next expansion to be honest.