Very balanced being an objectively inferior version of an already mid 7.7. Compared with the ZSU-37-2, you have almost half the rate of fire and slower shells. This makes hitting targets, especially manuevering targets, more down to luck than skill as they can literally fly between the shells that are being fired.
It’s only better at tank hunting, which is not something Sweden needed for this lineup, since between the USH and ZSU-57-2 they had no shortage of squishy flanking tanks.
And even if it was balanced at 7.7, that’s still irrelevant to the core of my argument, which is that it’s position at 8.7 was critically important to the overall CAS versus SPAA balance. Removing one of two vehicles that can even hope to counter guided weapon CAS at the tier and not replacing it with anything was a terrible move for game balance.
And don’t give me the historical accuracy argument either. This isn’t some fantasy round that never existed or worked (Looking at you 128mm APHEDS rounds that just IRL shattered due to the high velocity). These are rounds that would obviously have been given to the VEAK later in life had it entered service. The same justification as dozens of other historically inaccurate vehicles. A small price to pay for game balance.