I think the star wars code is great so far. I wouldn't be worried about Stern abandoning this one. It's a universally loved theme and will sell well. People complain about the game being released with pre 1.0 code but I prefer it this way. Get the game into the hands of the collectors and let them talk about the code. I like to think Stern reads these boards to get ideas to implement into future updates.
I admit I got caught up in the code anger over Kiss, but when I play the game now I realize it was very petty. The code on that game is actually great and it's a fun shooter. I set my expectations based upon the comments of the posters on this site vs making a objective judgement. No game will be 100% complete in the eyes of all. Metallica, AC/DC, TWD are all phenomenal games with great fun layouts and code and people still bitch up a storm that they're incomplete.
At the end of the day, you'll never know if a game will end up finished or not. But Hey - it's just pinball and really doesn't matter. Buy it, play it, love it, hate it, sell it.