If I hadn't played the pantheon, I would've gave the game a rating of 5 stars but unfortunately that didn't happen. Why? Let me explain.
The pantheon was an interesting idea that reminded me of Kingdom Hearts Data Battles (which are insanely fun btw). In this part, you fight every single boss of the game, including their powered up versions. This made me realize how good most of the bosses were designed, with fun patterns and overall, a great experience to offer. Only for one boss to ruin my experience, which unfortunately is the main boss of the pantheon. Yeah, I'm talking about Absolute Radiance.
I'm a try-hard player which most of the time would try to do challenges such as hitless and whenever I'm trying to do those things, I'm able to appreciate the bosses at a much deeper extent. In this case, Absolute Radiance made me realize how poorly it was designed (compared to the other bosses), making it pretty much unfair for the player most of the time. It's more luck based than anything as it will depend whether her attacks overlap each other or not (in case not, you better do your best to get the hitless run). This is something I didn't see with the other bosses, which even the hardest of them, were pretty fair if you ask me. There weren't times where you would get trapped in between of two or even three attacks and die, not at all or not every time. Absolute Radiance in this regard, is trash as it goes like "spam everything to win". I defeated her many times but I always ended up getting hit at least once. This type of feeling never happened to me with any other game I tried. For example, KH3 data battles (even with pro-codes) are pretty much fair for the player, being really consistent most of the time. They test your skill and even though they're hard, it ends up being really fun and fair! Absolute Radiance is not, aside from not being fun at all, it's annoying and unfair.
The pantheon was just an okay DLC at the end, I finished it really quickly (after two tries btw) but I didn't enjoy fighting Absolute Radiance at all. She basically destroyed my experience with the game and my perfect rating as well. It's kinda surprising that after every good boss I fought, this thing came in the end and it was SO DISAPPOINTING.