Hmmm it feels just like what it is, and that's a mod of Arma2 and nothing more. I don't feel the game brings anything new. Once the novelty of the voices and different weapons wears off, which is pretty quickly, you don't feel like it's a new game at all. Nothing seems to add to the immersion to make me feel that I'm on the Eastern front of 44.
The game continues to fuel my biggest gripe with Arma single player and that is that game play is not realistic due to the AI. This is pretty bad for a series that strives for realism. Will they ever work on the AI? It has the same problems since OFP from 11 years ago.
If you play realistically, that is avoiding getting killed at all costs, you'll find your AI buddies will get the enemy before you get a chance as they have super vision. Or the the enemy AI will kill all your buddies and then it's you against them solo or the mission is a failure.
The other option is to be more reckless and learn from your mistakes as you progressively die throughout the mission and reload the last auto-save to have another crack, until you know where all the enemies are and how to approach them. How's that immersive or realistic?
MP might be the place to be, but the usual case for me is if the server has a good ping, it's devoid of players. I'll continue for a bit, hopefully the campaign improves or I'll have luck with finding an MP server.