I'm not sitting on the fence, you are just reducing things to two extreme positions, neither of which is correct. You fail to acknowledge the possibility (note I say possibility, I'm not even getting to proof here, just the logical fallacy) that the Panther design flaws made the German strategic situation incrementally worse. You insist that there is no possibility other then that it lost them the war or it didn't hurt them at all. That is a logical fallacy.
But the fact is, no one proved it made the situation worse

There are lots of opinions thrown, but no one still proved it decently. I´m not affirming anything - I just stated my opinion that the war is a thing with multiple variables and the choices Germany had regarding TANKS were too irrelevant to change the outcome. That´s all. I never said it was na absolute truth, but I didn´t see any arguments totally negating it.
Besides, what a weapon needs to be considered to have strategic impact? Instead of just tactical impact, or even none at all?
Please Stop. As a person who makes a living arguing, writing, and arguing in writing, you guys are making my head hurt. Just stop. Let's talk about how nations should not get different base-line tanks, but with research and combat experience each nation will have different tanks... You, know, the topic of this thread.
But that is linked with the topic. If mass producing cheap tanks is the best STRATEGIC option, well, anyone will just build cheap médium tanks... So like it or not, you HAVE to decide if trying to build new and heavier tanks was Worth it or just a complete waste

specially because the game will be about producing individual tanks, instead of brigades.
As a game example - if Germany is on the defensive and you decide to begin building a better Panther than the D variant by january 1944 - should that have enough impact to actually make you turn the tide? If the answer is "no keep building cheaper stuff" then well, why get better tanks then?
That´s the crux of the problem - in real life producing old stuff inevitably makes you have strategic disadvantage UNLESS the impact of not investing was decisive to win the war. That´s why I think that staying at a technological dead end would not be exaclty good to Germany - it wouldn´t be enough to win the war, and would make them have a disadvantage as better allied tanks inevitably were created. Unless you think US would be too dumb to build Sherman with 75mm gun all the way to 1950...