Speaking as someone who has never bothered to 'git gud' at a traditional fighter (i don't got the patience fo dat), I find them far more visually striking than arena brawlers. I guess this is born from the focus on gameplay depth, as they have to grab the player's attention in order to encourage them to play at their best. At a glance (since I don't normally follow those games), a lot of Arena games feel pretty samey due to seemingly focusing on the character doing 'the thing' more than how the player does 'the thing'. That and they usually sorta have the same psuedo-2d vibe, compared to regular fighters which tend to be much, MUCH more varied.
Tbf, that last one's mainly because regular fighters have been around since gaming's evolutionary hah stages and can cover nearly ANY silly idea you could cook up, but arena games are specifically adaptations of preexisting content (mostly just anime, on top of that mostly just shounen) making them a lot more constrained.
For example, I don't really care much for JoJo ASBR or Eyes of Heaven outside of character interactions, but whenever I see Heritage For the Future my eyes and ears are insta-glued to the wacky action.