I have a personal, albeit expensive, rule I adhere to when buying and collecting Hasbro Star Wars toys: "If I buy this silly re-issued ship or re-painted action figure sculpt, it lets Hasbro know I am still interested no matter what it is and they'll keep making stuff and every so often throw in something cool we've never seen - like Ephant Mon or Ellors Madak." The way I see it, everytime I (and everyone like me) buy something like the re-issued AT-ST/Speeder Bike set, it means the Hasbro cycle will continue.
The cycle goes something like this: something old (re-issued AT-ST), something new (Shmi Skywalker), something borrowed (Ewok sculpt re-painted), something blue (as in, that's how I feel every time I hear there's yet another Luke or Han coming - Bacta Tank excluded!). Three out of four in this cycle isn't great. But, after all, it is Star Wars, and in that case, one of four is plenty.