Not all TIE's are restricted with no hyperdrive.... My favorite, the TIE Defender has one, as does the TIE Advanced.
Also, Evergreen everyone is right to have their opinion. Personally I dont think AT-ATs vs. Jedis isnt stupid. If an uneducated jedi luke can kill one on foot just think what a trained jedi can do. You underestimate the force young one. The power to destroy a planet is insignificant next to the power of the force.