Arena has annoyingly turned into Battlegrounds-lite
This might just be part of my bias of thinking that BGs is warping the rest of the game despite ostensibly being its own game mode that can be ignored, but Arena has gotten more annoying (I'm keeping my Infinite Streak alive in my quest to get Wong, but my oh my is the life being sucked out of me).
I'm not exactly sure how Arena creates the team of 3 opponents for you to face, but since (1) It is likely cobbled from among the top champions in a Player's roster and (2) There are enough players who choose to rank up BG defenders to be their top champions and (3) BG Meta defenders tend to have high Prestige, it now feels like Arena is being forced to cosplay as BGs.
Three matches, win at least two of the matches or else you lose the round? Check.
High chance of losing the match, if not the round, if you didn't "draft" the right counter? Check
Have a chance at 'banning' a defender (since you can select one of three player matchups you want), but then be at the mercy of how the "draft" goes (the other two defenders that aren't shown)? Check
Have to face 3 straight tough defenders? Check.
Its getting pretty annoying especially because you don't have any real control, unlike in BGs. Doing an arena grind and just taking in random 7-stars to keep your streak going? You better hope there isn't a Serpent hidden in one of the matchups when you don't have a mystic champion. Even defenders that might not need a specific counter since health and match time is unimportant, like Bullseye or Onslaught or Photon, your chances of winning are less and the fight takes a lot more time.
And unlike BGs, if your high powered team comes up against a weak 3 arena opponents, its not like the arena will forefeit and just save you time for the win.
In essence, with the large mass of BG focused rosters, your chances of winning in Arena is less, you waste more time in a game mode that is already a grind, and you don't earn anything more for facing more difficult matchups. It doesn't help that if you lose a match/round, you lose a lot more time due to the cooldown timer and/or having to build the 3x point multiplier back up.