As someone who built pure stealth, it was absolute horseshit. Random 1 shot kills, horrendous checkpointing and just general terrible fuckery. Only way I got through was by memorizing the reinforcement patterns and sniping out the biggest threats before they could land. Under normal circumstances? I had zero chance. Just generally bad level design.
You know what's not fun? Sitting behind cover while reloading and having a tank that you had zero way of knowing was pulling up 1 shot you while you still are under cover.
Seriously, Fuck that mission.