How Do Public Beta Environments (for ongoing MOBAs) Benefit Gamers?

There was a massive overhaul to League of Legends’ "Rift" after Riot’s mid-season patch. Every new patch usually comes with some controversy but this one takes the cake. Players are complaining about "RNG" being added to the game with new random elemental spawning dragons. People feel that changes to the Rift Herald which now gives a twenty minute long buff (which in some cases is essentially the entire game) to one player that cannot be lost during death is unfair. And of course, there’s the running saying that any newly released champion is overpowered (which marketing-wise is probably intentional, it gives people incentive to buy the character right away since it will be nerfed later).

Many players have access to the PBE and some youtubers make a living off of releasing the newest PBE content before it hits the game. With so much potential feedback it leaves me wondering how some obviously un-liked and controversial updates come to fruition. Though it need not focus on Riot I think it would be great to see an article focusing on the process of decision making that happens behind the scenes. What is the company structure? I’m sure gamers would like to know how much of their input goes into certain gaming companies’ decisions. Perhaps it could even serve to relieve some tension from between the two parties. Are more direct and preemptive quality feedback strategies necessary for any variety of gaming companies; are PBEs enough?