Most of the balance team shittalk and conspiracies are a great example of this.
While a lot of people seem to blame balance team for the problems game has, without acknowledging the fact that with rotten foundation layed by relic its really hard to build something solid.
Balance team over-all did a good job into bringing the game into more or less balanced state, but the path to it is very subjective.
As an example, we can at the whole situation with the TDs in the game. Are the TDs right now balanced? Yes they are balanced. But they ultimatly made game less fun and spammy (at least outside 1v1). Because the aproach of TD balance was strate-forward in other words giving them insane penetration, since they needed it in order to fight heavy tanks. But in proccess of doing so, TDs become supper effective against all vehicles. The same way TDs could have had lower ROF, but increased damage making them less deadly against mediums, but better against heavy tanks. In theory at least.
Other stuff balance team had fixed was pretty much shit stains from old relic design, which were objectively bad choses. I mean, its cool that ISU\CB\2 model sniper and so on were fixed, but I'm pretty sure it took longer to get those in Relic "scope" rather then finding the solution. Still its good to have them fixed non the less. But again we dont know how much times "scope" thing was just a convenient excuse and I am pretty sure it was used in that way at least ones during CoH2 life.
But again balance team are far from being saints themselfs and they are known to ignore even resonable feedback about their ideas. The most recent example is B4\ST changes, even before fist changes were made to mentioned units, majority is good players have said that it will be broken\OP but it was ignored, just to be nerfed later. And we have plenty of such examples like VSL, penals and so on. I mean sure, its good that it took less time for balance team to accept that their idea is not working (unlike relic back in the day), but yet it still takes more then a week to fix. And it doesnt really makes players happy that they will be forced to play god knows how long with VSL\Penal\Cons blobs, ST\B4 nukes, Osttroopen LMG hordes and so on, especially considering the outcome was predictable from the beggining.
Also the whole situation with "bandaids". When there is no easy solution to address the problem balance team rather nerf this thing into the oblivion for it never to be used again or be super lackluster.
Personally my own and single complain, is that balance team are kinda lacked "creative approach" and "out of the box" thinking about some problem solving. But again, we dont know what relic allowed to change or to add to the game, but at least for some problems which relic allowed balance team to adress much better solutions could have been found. Some of the units\abilities after such changes became merely "side options" being marginally better in something so specific that they are not even woth picking if they are not part of the meta.