I don't know if this is a bug or a feature.

On Sidi Bou Zid (and possibly other maps, haven't tested it yet) the .50 cal AA machine gun can't be re-armed with ammo boxes. It's also missing an ammunition belt/box counter which made me assume it couldn't run out of ammo, but it apparently can.

^ They might be immersion breaking, but they also help to keep the teamwork focused, and that's not necessarily a bad thing...

I don't see how a flashing icon in my FOV is improving teamwork, but whatever floats your boat.

No they're not. Since the new commorose is there to make is possible to give more precise orders, you can order your squad to attack/destroy/mine/repair specific objects now and without 3D map icons it's not possible. I like to give precise attack orders in urban areas, I just use t-command rose, aim the target and sword icon appears on my order (or the arrow icon on the exact place I want my squad to advance).

That was also possible before the change to the new look.

You can always turn off the 3D map if you're bothered (and step on random smines, but I guess knowing there are friendly smines around by a magic floating marker is also immersion breaking)

If you think it's super redundant you can always swith your 3D map off, just like LuckyOne suggests, for me they are super practical.

They cannot be turned off now with the ALT key. Even if they could, turning it off or using the immersive HUD option only gives you a disadvantage over the other players who have it on.

This map could use a ticket increase for both teams.
Compared to the other maps, an average round on this one lasts rather shortly. Especially when there are 80+ people playing it (I understand that the maps are "balanced" for 64 players). It's a shame, really, because it's such a nice map.