It never really changed from Flashpoint. The engine has been pretty, the scale impressive and immense, fine sounds, but alpha in performance and gameplay. It just looks 'realistic' and 'IRL pace' because people have to press a boatload of keys to perform the simplest of actions.
Shall we talk buildings and interiors? Let's not. While you press more and more keys, getting farther and farther from your goal in the meantime, lost in communication screens you'll never, ever use, during these tense (!) moments, you get killed by a rusty, binoc-shooting AK47 at 15 kilometers.
It's a superb holiday sim though. Forests look awesome (they always did actually, as I'm sure they were an inspiration to Hurtgen Forest). Scuba diving looks awesome too. A good game? Not so much. It never really takes off, whether it's called Flashpoint or ArmA 5.