Ike's throws are fine. considering the massive power he has elsewhere they had to balance it out somehow. which they did with weak throws and a mediocre recovery.
as for the Eruption against a recovery Squirtle and Mario: Anex is right it is quite hard. you actually have to time it perfectly to use the super armor frames and hit before they grab the ledge and get some super armor frames. it's actually pretty difficult, even for Ike masters.