The criticisms are about what I expected from the official footage + bits and pieces of spoiler streams I saw about.
The overall gunplay has always looked solid, but the gameplay footage here and there has always had a tinge of clunkiness to them. And the QTEs, etc, is relatively well-documented. Not necessarily a bad thing, but it's definitely something that's love/hate in terms of QTE-design choices, and if you're the type that dislikes QTE anyway, one wouldn't like it regardless.
Obviously can't comment much on the mission design thing because only saw two spoiler chapters, but I've liked what I've seen of the little spoilers here and there in terms of the moment-to-moment pacing. It's not all-shoot-bang, and while it's linear, I liked the flow and pacing of what I've been spoiled.