Maybe controversial here in a thread titled "NO 3D-spotting", but hey, let me dare my skin and defend the feature as I truly hope it will return to the next Battlefield!
When EA launched Battlefield V, it was intentionally to be 'different'... No problem with such game and approach. The 3D spotting function had been removed very intentionally. Some players here appear to like it like that. But as with all changes, some players do not. I for one, truly miss the 3D spotting function, especially for the many many very good things it actually brought to the older BF games!
The enablement of great teamplay and collaboration, increased game pace, accessibility, target acquisition, clear combat, vehicle involvement and collaboration with infantry/other soldier units... I found it a key feature in Battlefield and I for one missed it badly in BFV. Not the only reason, but an important factor, so much that I reverted back and now will remain and enjoy the BF4 gameplay until we hopefully will see the feature back in the next Battlefield game!