if that's the case why isn't it used every game? doesn't matter about high level play or low level play, if a unit is OP any player at any skill level would abuse it. its not like other area reveal units, cant be used anywhere on the map without risking itself, doesn't completely reveal so it cant be used together with call in arty, and i said situational because of its limitations, + taking of pop cap space while having no combat effectiveness. Many people would rather have an extra infantry squad or have that bit extra space to pull out a tank, To say its a no-brainer is simply untrue. So please stop exaggerating.
The issue with the unit is cheese and the bug that can occur which can be game breaking if it occurs, i myself have said this unit needs to be redesigned and not what people like you want, which is anything you dislike on axis side is to be nerfed out of the fkin game.
It's not used every game for (probably) one of two reasons:
1. It only provides
indirect utility. It's not buffing your DPS, it's not suppressing enemy units, it's not really doing anything directly at all. What it does give you is information which you can then use to make
other units more effective. Unfortunately, this type of 'indirect utility' means that few people end up using, despite it being incredibly powerful. It's similar to how the OST Mortar's counter-barrage toggle is rarely used, despite it giving a noticeable range bonus, making it an excellent counter to a ton of different units.
2. As WingZero said, it's map dependent. On smaller maps (i.e. 1v1), it's not as useful, since your normal unit's LOS will let you see a lot of the map anyway. There just isn't a need for shot-blocker ignoring LOS on these types of maps. It only really becomes incredibly powerful on larger, LOS-blocker filled maps.
Additionally, it's important to note that the unit has a few large bugs associated with it that have been present (iirc) since release. At this point, they might be considered "features", but I'm unsure as to their status with the new 'gameplay guidelines'.