Star Wars movies are a cinematic event, whether you're a diehard fan or not. I watch movies on the first day anyway, but I'd definitely want to see Star Wars asap you want to avoid spoilers.
I didn't go looking for spoilers for TFA, nor did I avoid them, but I knew many of the major points going in. I knew Han was taking the fall a year before the movie came out, I knew what little we know about Snoke so far before seeing it along with the Death Star not Death Star, there were no big surprises. It didn't spoil the fun ride of course, but Han's death didn't have the impact that the OT reveals had in the pre-internet days.
With TLJ, I honestly have no idea what to make of it, besides a few deceptively cut snippets in the trailers. What's the main plot? What do the characters spend the majority of the film doing? Rey sorta trains with Luke maybe like ESB, but even that may not be as clear as it seems. Rey meets with Snoke/Kylo somehow at some point and maybe there's a fight maybe not? Fin goes to a casino planet for some reason? The other dude might be doing something. Leia might be doing something. It's unbelievable to me that we're only a week out.
Assuming the movie is full of great stuff they're not showing, I like this strategy. It's one of the biggest film franchises, and is a sequel to the third highest grossing movie ever worldwide. It doesn't need to give away all of the best bits in the trailer for people to see it. People are going to see it. The more they hold back, the more essential it is for people to see it.
So for that reason, I'm neutral on the whole thing because I feel like there's not enough to judge.