What is closed at DHS that hasn't be replaced by another offering, other than the backlot tour. I keep hearing this "everything is closed at DHS" junk, but in the end, nothing is really closed, except BLT, what we are seeing is the overall lack of offerings, but this isn't new.
Well, there are a few other things that may or may not matter to you. The Jack Sparrow attraction for instance, doesn't matter to me but is now closed. Sounds Dangerous to my knowledge, has never been replaced with anything permanent at that location.
Also, how far back in time do you want to go and how much of a game of 3 card monte are you up for playing? American Idol is gone. That was replaced with the Frozen Sing Along but that was already being done in another part of the park so still a net loss for attractions. Now that, which was added in recent years went into a space that was previously used primarily for private events and for the comedy club that they put in there seasonally, prior to its current location. That comedy attraction is currently in operation but is expected to shut down again in a few weeks when the season ends and this venue for largely private events had previously been the home of the live Hunchback show which was a full time attraction.
The Backlot tour may be the only e-ticket gone and not replaced in recent memory but that's a major thing because how many times can you recall that happening in WDW history? Body Wars? 20,000 Leagues under the sea*?
To be fair though, when you see a lot of people on there talk about things being gone, I think they're projecting a bit into the slight future with things they know or strongly believe will be going away rather than what currently has. You're right that this kind of thing shouldn't be considered when talking about average guest reaction when those people don't know what's leaving and what isn't in preparation for new development. Just the same though, I think the message Disney sends when make the upcoming additions of Star Wars and Toy Story to the park sound like such a big "expansion" is, Hollywood Studios will be an awesome place to visit some day when that's all done. If I was considering a once in a lifetime or once a decade trip, that might impact some of my decision making a little bit. I'm sure mileage varies with average guests, though.
*Obviously eventually replaced but I think when something is closed long enough without a replacement that an entire generation doesn't realize a new attraction replaces an old one, it doesn't count in this kind of discussion as a replacement.