All-in-all, an Imperial game is FUN, but you’re likely going to have to make extensive modification to the setting. For us, that wasn’t a big deal because we tend to do that anyways. For us, Star Wars works for us in a 2 hour pulp film but there’s a lot of questions that come up in a world-building context that really don’t lend itself that well to the default black-and-white morality in our eyes.
So true - what makes for "good" cinema doesn't always make for good RPG material.
I do think it takes some deviation from cannon to make the Empire into something other than an objectively bad organization. It's founded and run on objectively bad principles, and as long as canon Palpatine is in charge, it will be objectively bad. Fighting for the canon Empire and yet not actively fighting for outright evil is walking a tightrope of pretty epic proportions.