Ok, here are my general thoughts about the episode.
Starting from the beginning and leaving the debate stuff for later, I do think they did a good job with the character analysis of both Clive and Dante—their general characterization and backstories were well handled. And as predicted, they didn’t just dismiss Devil May Cry’s lore/cosmology, as some people strangely believed they would. Like, seriously, why did anyone think that was going to happen? Ever since Dragonborn vs Chosen Undead they’ve been including lore, and Kratos vs Asura made it more than clear that it’s now standard.
As for the actual animated fight, I think it was up to the standards we now expect from modern Death Battle, aka its was really good. It’s definitely not on the level of Bowser vs Eggman, but I do think they delivered what most of us wanted. The only hiccup was Dante’s death—it felt a little weak—but aside from that, they did a good job showcasing both characters’ abilities, fighting styles, weaponry, and transformations.
And then we get to the most controversial part of the episode: the result. For the physical stats, I think it was fine to have at least both Base Clive and Base Dante scaling above begins who can destroy and affect multiple universal size realms. I’m not sure why they kept them at just FTL+ when they even brought up one of the black boxes, which contain feats putting them at Quadrillions of Times FTL.
But i guess, in this case, it wasn’t necessary and wouldn’t have altered the result in their opinion. Unlike Asura VS Kratos—where Asura had a far blatantly Massively FTL+ scaling, which force them to bring in cosmic scaling for Kratos in the front make clear that they were evenly in Speed (only to butcher it when they used Helios).
Where things start to get messy is with Dante’s Powers and Super Forms's Multipliers. As others have already mentioned, they underestimated or outright ignored the full extent of Devil Trigger’s Multipliers, as if fully included then Dante at peak should theoretically be definitely stronger/faster than Clive at his peak, as well other stuff like his Regeneration be stamina-based or all the Haxes he as a demon should have, which would have likely made Dante the winner.
Overall i think its also another 8/10.