I’m pretty sure there was a discussion here somewhere about how maps in QP are not actually chosen with equal chance. IIRC, those maps that have less completion rates are more prevalent in QP by design.
I remember something like this but I believe it was disproved. Imagine having hundereds of hours in Helmgart before first DLC came out. You could have completed each mission 1000x . With that logic you described it would mean that you would have to play 2000 games in the two Bögenhafen maps when it came out. And this would apply to everybody in the game. I dont remember that happening and I dont remember having this QP issue before.
If I understand correctly, you mean the part where it calculates everyone joining your lobby? That is invalid since I start my games alone with bots and people join after or dont join at all.