It's hard to gauge this series so far, as this episode reeeaaaly needed to be a two-parter. Things felt rushed, so we didn't get much character development, though I do like what we did get, even if Blue is an idiot (seriously, robots? he's worse than Ethan from Dinothunder).
As for the bit with the Legend War at the beginning, I think it worked, though only as part of some big foreshadowing, though time will tell how that plays out
This episode also seemed to have a bigger visual budget, as the CG robot (I forget his name) was well-animated and I love the teleportation effects. It's also nice to see a mentor picking teenagers for all the RIGHT reasons. What's better is that these kids aren't goodie-goods like the Samurai rangers
Again, though, this episode felt very rushed and deserved a two-parter (seriously Saban, this is your 20th anniversary season, I think you could find the money to do so), and while I think it's too early to judge it as a whole, I do have hope for this series.