Unpopular Opinion: last BG meta was the best one by far
It was the only meta that actually required you to use some kind of strategy when building your deck/drafting.
Literally every other meta has just been: "Put in your top 30 champs. Nuke down every fight". These kinds of metas magnify the rank difference between champs and minimizes the importance of skill. All my opponents just nuke down my defenders with their r4 AA/CGR/Nimrod/etc.
Last meta was so much more nuanced, and it allowed you to really outplay your opponent.
And matchmaking is still messed up. I'd recommend Kabam do some kind of system similar to other games where there is a "variable season reset" instead of everyone starting back from Bronze. Then take away the whole prestige matchmaking system cuz it's wack.