Up Air still hits twice, same as Peach. This can be seen in her trailer on the Smash Bros website.
So far, I'm a little unimpressed with how Daisy is turning out. I love Daisy, and all, and I'm going to main her, but they're really driving home the fact that an Echo Character is almost verbatim the base character by giving the term "clone" a canon name. I'm hoping Sakurai will take away that Echo status and flesh her out like she deserves to be, but with only 6 months left till launch... Maybe next game, considering she doesn't get cut?
One thing I've noticed, also: Daisy barely appears anywhere. She's been, so far, in her own reveal trailer, the perfect shielding demonstration, the Great Plateau Tower reveal snippet, and her trailer on the Smash Website (a combined total of maybe 40 seconds of footage, some parts even the same combo on different stages: Side Special to ___ to Up Smash to Up B).
Even other, less popular characters like Pac-Man, Duck Hunt, Wii Fit Trainer, etc., show up more than that, be it in other characters' trailers (getting combo'd, Final Smash'd, etc., just to show off some moves on various opponents), stage reveals (just hangin' around, no matter if they necessarily "fit" the stage), so on. You'd expect her to be AT LEAST in Luigi's little trailer, for obvious reasons, but... Nothing. Pit is in Dark Pit's trailer, Marth is in Lucina's, but with Peach in Daisy's trailer... She's just not there, no move comparison, no "Hey, look at her Echo standing by her!" but Peach is in one of Daisy's images, showing off a white dress. Any other Mario character trailers, like Peach? Nope, nowhere to be seen. Inklings and even Ridley (the character they kept the most secret, so it'd make sense why he's barely seen) seem to show up wherever you look. They were in the E3 version, for example, but the 3rd new character? Crickets. Wait till December.
However conspiracy theorist-y it sounds, I really hope there's a reason behind that. Peach has been shown plenty all across the board, but Daisy (a new character, for crying out loud!) is just gone, aside from her regular 2 trailers and 2 very hard-to-see, almost insignificant demonstrations (one is just rolling, and in the other, the Great Plateau demonstration, she actually leaves once the camera cuts to another dramatic shot of the tower. Everyone else remains, but she's not there anymore, implying the shot with her was added in post once she was included as an Echo).
I'm assuming it's just an oversight, because it's kinda stupid to even think they'd do much more with her, but maybe that hints that she's still heavily in development. Perhaps even being added as an Echo Fighter was a last-minute addition. Overall, her entire inclusion just seems rushed. Her taunts and entrance animation are the only differences that we've seen, as if Sakurai thought her up the day before E3, put a Daisy trophy model over Peach, and mocapped 3 animations for the next day. I can only dream, but y'know. She's much more than a Peach clone, in my eyes. If Sakurai bamboozled us by just skinning Daisy over Peach, and Daisy is actually a new, fully fleshed-out character, I'll probably have an aneurysm right then and there. There'll be nothing left of my brain.