Well, people seems to be less vocal about Magnus here, but in france, the main argument is "He is playable", but if he is playable, it means we also need a Little Girl/Dog tag team
Plus, the Little Girl also have her own theme, another argument I see for Magnus
The second thing I see is "Magnus is the strongest human", wich is true in Uprising. But, what unique thing can he bring to Smash Bros, considering we have lovable gods with potential in Kid Icarus, and Ike in Brawl?
Also, I have trouble to see him balanced in a game like Smash. I mean, his sword is HUGE. If it means we get a super slow Ike with a bigger range, well, no thanks.
I also simply don't like Magnus