'Quality over quantity' may apply here. 15 minutes can contain more and better info than an hour if successfully condensed (filtered out less important, "filler" content).
(Sorry if I'm repeating what has already been said. I just threw in my take on the subject.)
I've been removed a post cause it was too harsh (and I apologize).
But yeah, to get to the point...
I'm scared its a "Controlled quality" and that's basicaly all we ever had untill yet.
CDPR spams us with art-direction (looks good, but that doesn't make a game...).
They avoid EVERY direct questions about direct gameplay (how skills works on the game etc...), or just half reply and "well, it could change", and then tells us stuff we don't really care (like romance, being able to buy sneakers and stuff like that).
A 1hour long (mostly, remember guys, it's the LAST E3, I mean, it could be the last chance we'd have any footage before release, see what I mean?), let you see and FEEL the game, how the crowd works, etc...
A real taste on the game.
Here, with all that "Controled" quality...
I'm scared we'd have a "Mc Donald" thing.
You know, when you stop at the drive-in, the burger on the picture looks juicy and tasty but when you have it, you're like "Ewww.... Well it's kinda like it looked like, but that's not worth the wait and the price".
So, I'm not angry because the video will be shorter, I don't care about quantity, more about the honnesty of what they're doing.
Nothing tells us CDPR aren't "lying" (not directly, but you see what I mean) just to hype a game they know won't live up to the hype they created and stuck themselves in a loop.
They tells nothing and bait us with things that could be off from what they'll deliver.
Just like in the old days, when they packed the best level in the Demo and when you had the full game, you felt like you had just as fun for free.