What do you think of the unconfirmed characters of the leak?
Mii - Hate, and will always hate. I don't personally see how them allegedly being portrayed with personality in Tomodachi Life will translate to them not being soulless prop-spamming wastes of space in the different context of Smash. I respect those who enjoy the character, if you can call the Mii a character, but it's the absolute furthest thing from my cup of tea.
Pacman - I have no interest in the character, but will be happy for the victory his fans have achieved. They've eaten a lot of crap from people who do just outright distasteful things like go into their support thread and call out members for being unproductive in life, due to some being older fans of the character. They deserve a bit of sunshine in the wake of all the negativity. Also, so much for "Namco will not get any special treatment."
Palutena - Good, a solid character with a solid international fanbase. I don't consider her a victory for the fans, however, because, in spite of their numbers, Sakurai was always going to add this character because of his personal bias. His bias is a large reason why so much fanfare was made about Medusa and Magnus originally, before they had even ten seconds of trailer footage to their name. Palutena has branched beyond that, of course, but even if she hadn't, she'd still be in the game.
Chrom - Expected, most likely forgettable unless he has a stance-changing mechanic. Hopefully he doesn't replace Ike, because the last thing we need for the next game's speculation scene is a Fire Emblem cluster**k between Ike, Roy, New Lord With Uncanny Totally Coincidental Resemblance to Ike/Chrom, and More Palatable Character Who Isn't That New Lord, among the other minor side characters.
Shulk - Good for his fans, I'm excited to have his series' music in the game more than anything else.
Chorus Men - It's way too premature to deem these characters inherently a good, unique idea before they're even revealed. I don't care about them, although I'm not taken aback by their inclusion, given that I didn't expect WFT to be the only "shock" character. Totally expecting Sakurai to come out and claim that he didn't add these characters for cheap novelty despite him almost certainly not looking to Rhythm Heaven for newcomers unless he was looking for precisely cheap novelty.
Overall, I think it's a mediocre group of newcomers that, unless incomplete, will net a lot of "I'm okay with this roster" passing grades, so to speak, rather than "Holy hell, this is a great roster" accolades (cue inevitable hipsters parroting the latter to "prove me wrong").