This game is way too much fun. I admit to having doubts about it, especially about replayability for the Campaign game, but we spent an entire day yesterday playing five missions, and I don't remember having such a good time. The nice thing is that the design ensures that you never will play all the possible missions first time through, nor are you using all the heroes, so there's always something new. Add in the new missions and skirmish maps that go with the upcoming Character packs, and I can see this game going on forever, especially if FFG publishes new Campaign arcs and associated missions. Hello, FFG cash cow!
This being said, I would like to encourage creating new Heroes. The six that came with the game are wonderful and cover all the archetypes, Still, I'd love to see possibly some alien heroes, another Force User/Jedi, more female heroes, etc.
And of course, I hope in time we see Yoda, Obi-Wan, and Jedi Luke. I realize in the time frame of the current Campaign, both Yoda and Obi-Wan have "joined the Force" but they could take part in Skirmish games...and a campaign taking place earlier would allow these iconic figures to appear. After all, what is Star Trek without Obi-Wan and especially Yoda?