I like the fluid CQC and dive function but aside from those, everything else feels samey stealth-wise. The setting definitely doesn't help, especially since a lot of it feels so barren that most of the sneaking ends up with you just going on one side of the map until you reach the destination. Certain missions had some fun moments if you try hard enough, but with very little payoff at the end of each segment and a lot of recycled missions/locations, the whole thing just feels really choppy, unrewarding and repetitive. It wouldn't have felt as bad as it did if the story was actually decent, and we all know how that turned out.
Yeah, very little "fruition" as an overall experience is a pretty good way to describe it.