My thoughts, but first some info:
* Opinion on the original: Suspiria has always been an odd duck to me. It looks great. It sounds great. It has multiple classic bits. It has a great concept. At the same time, I never felt like it came together like Argento's earlier films. It's the rare case of where I thought a remake would be a good idea. I'm not really a fan. Deep Red should be Dario's most well known movie.
* Opinion on Luca: Only saw Call Me By Your Name, which I didn't think was very good. I thought it looked really nice, though.
* Opinion on horror: Big fan. I've liked all the divisive critical darlings of the past few years. Also have no problem with long movies that build to something.
Suspiria 2018 (no spoilers)
I pretty much didn't like this at all. The movie's biggest problem is the complete (and I mean absolutely complete) lack of tension, suspense, or intrigue. What's going on is pretty clearly laid out early on, and I think this is the source for much of that issue. It doesn't feel like a narrative, it's just scenes after scenes. There are a few bits where it felt like the film was gaining some motivation, but it always dissipated in a scene or two.
It's also not very good looking. It's Berlin in the 70s, so I'm not expecting beautiful vistas or anything, but it's just a very plain looking movie. You've seen some striking shots and imagery in the trailers and... that's about all there is. There are some phantasmagorical sequences, but none of the imagery is original, some of it is silly, and the editing in them is not so hot. The big balls-out ending also looks pretty bad by several measures, but I'm not going to go into details because I'd probably have to spill too many deets.
Editing in general is a problem in this movie. I'm not sure I've seen a recent big movie with this many cuts that seem unintentionally bad. And I mean, there's the other sense of editing, too—you might be able to make a salvageable movie out of this if you trimmed off an hour. And I mean a full hour. The big dance sequence in those ropey red outfits from the promo pics is such an enormous disappointment due to the editing. For the most part in this sequence, there's a cut after a dancer does only one or two moves, moving on to a different dancer or group shot. There's not much of a sense of continuity or actual dancing in this sequence, which sucks because it's clearly intended to be one of th bigger moments of the movie.
Thom's score didn't strike me as bad; it just struck me as a non-presence. Aside from his two (iirc) vocal songs, it's not a notable soundtrack. It's really only a failure in that it's going to be compared to the original's soundtrack, and, well, it does suck in comparison to that. Really, there's not much of a soundtrack to this movie at all. It's very frequently silent on that front.
Performances and such we're fine. Tilda's not losing any credibility over this.
I'm going to read up on some of the themes and things I think I may have missed, but I really don't see my opinion changing on the overall quality. Even if I read something illuminating that makes me respect what Luca was going for, this movie wasn't a particularly engaging or entertaining experience to actually sit through. This felt like a rough first cut that needed severe editing and some reshoots.