Yes, Samus has a lot of new abilities such as:
the ice missiles, storm missiles, cross bomb, spider magnet, melee counter (several variants thereof), phantom cloak, flash shift
and even ignoring things like speed boost/shinespark and power bombs which were in Super, but not represented or the Omega Cannon which is a temporary buff
... and I do hope that we get to implement them in rather than her being a chargeball machine.
But more than any single specific move, her entire physics and playstyle has completely shifted past Super Metroid. Zero Mission, Fusion, Samus Returns, and Dread have all given her a completely different and imo, significantly more fun general character to play with. No longer swimming in air, she's grounded and fast and fluid, able to navigate maps with zero hesitation.
Smash Samus feels incredibly stilted and awkward in comparison which while accurate for the time, doesn't represent her correctly in the now. It's to the point that I feel more like I'm playing modern Samus when I'm playing Zero Suit Samus with how good that specific Samus is at movement. This isn't to say Smash Samus is a poor character, far from it, the meta has clearly shown that Suited Samus is better to win with, it's just not in a fun or interesting way.
At the very least, they can change some animations so she doesn't have the ugliest nair in the game: