There are many things I don’t understand about developers, but one of them is their unpleasant habit of giving many SPAAs an excessively large and unrealistic zoom. For example, the AMX-13 DCA 40 has an absurd and unrealistic zoom of 6.8-7.5. The Falcon has 5.6-6.0. The Lvkv 42 has 4.7-5.0. All of these have an unrealistic zoom because, to be used as SPAAs, a large field of view is primarily needed, something that is completely lost with so much zoom.
Some time ago I made a suggestion about SPAA sights, since many have two sights, one for attacking aircraft and another for ground targets, so I imagine that the devs decided to give the SPAA the zoom of the ground target sight, making it difficult or impossible to use the sight for AA targets.
I remember writing a report about the walls of the SPAAs, specifically mentioning that they should have a minimum zoom of x1, and I was told that the game design made that impossible. Well, it would be simple: all SPAAs could at least be given the minimum possible zoom, be it x2 or x1.9.