I'm really enjoying the Arena! I genuinely think it's one of the best and most unique features on the site. However, I find the gameplay begins to drag once you get into the last stage of the fight, when you have all 3 star models (also, ngl i'm not a fan of the name ‘models’ it confused me at first). There's basically nothing left to do there unless you decide you've made a bad team decision and speedrun 3 starring a new model to switch in. But the majority of the time I just switch to a new tab and let the Arena run itself out without even watching. Like, as I'm typing this post, my arena match is playing in a different tab.
It would be really nice if the game was expanded in such a way that late stage gameplay is still valuable. Some way to spend paws instead of just letting them build up, some reason to keep your attention on the arena. The beginning of the match is so exciting and tense, I hate that it becomes boring by the end. It was satisfying the first few times, watching my well tailored team blow through the competition, but now I just end up wishing it would end sooner so I could start a new match.
tldr; either it needs some new “end game” mechanics, or matches need to end sooner. It drags too much and becomes boring by the end.