Same here, but some people have really good eyes for this shit.
Most of GAF are actual insiders/people who work in the industry, so from a technological/business standpoint they have a better idea of what they're talking about than we do. That's why a majority of leaks occur there.
I'm curious about the "combat being similar to LoS". Really? In a sidescroller? I mean, it's definitely possible but I kinda would prefer something less combo heavy for a 2.5D sidescroller. If that's what we're getting.
I don't understand it either, but I'm just assuming it means whoever we play as will be just as acrobatic/impressive as Gabriel was. Basically, more flashy/defensive attacks instead of just spamming something over and over again. Like in the original Castlevanias where even Skeletons were a threat opposed to how whimpy they are in the Metroidvanias, I think we'll be seeing that in the game. I don't think we'll be seeing any QTEs in this game though, QTEs do not sound like a good idea in a 2D game.
I'm expecting some massive bosses too, maybe even Titan size. The DS Castlevanias had some large sprites for enemies that were made up of several parts, think about what MS could do.