I know they do it random so they get opinions of all kinds of players whether new, noobs, experienced or pro.
But if their goal is to address and fix bugs before release then their approach is wrong.
They need to give the code to people who know what to look for.
For example everyone who pre-ordered should get a code, every verified player and people who played the game a certain amount of hours on fifa 19. Also should not be only Uk and US. US folks don't play fifa that much. Why not countries like Germany?
But sadly the closed beta is just a PR move, nothing you guys find would be changed in the final build else dynamic tactics,bycycle kicks, timed finishing would'nt have come bugged on release.