People do understand how Samus's dash attack works, right? It's not like a traditional tackle that linebacker Ganondorf and quarterback Captain Falcon do. She's using the thrusters on her suit to propel herself, so before she actually tackles, she's setting herself up. It's like how Ganondorf's Wizard's Foot works where he sets himself up and then rockets through with evil wizard powers.
Her Utilt is essentially like Peach's Dtilt, but the issue is that you can tech those. If it was untechable, it'd be great and it would keep the charm of slamming someone down and launching them. At the same time, they could just make it so has a high hit angle and keep the spike sound effect just because. As of right now, Samus's Utilt is frame 15-18 and does 13% on ground targets and 12% on air targets. Peach's Dtilt is frame 13-14 with her arm being intangible from frames 9-14 and does 7% regardless. Those are slow moves, especially Samus's. If it was frame 12-15 and did 11%/10% instead, that might make it much more useful, but it could kill its greatest asset: anti-airing. Samus's Utilt is a much better anti-air than Captain Falcon's. Why? 'Cause it doesn't spike airborne targets; it punishes or kills airborne targets. Captain Falcon's Utilt is useful as a spike and that's it. In terms of ground to air and ground to ground, Samus's is probably better even though you can tech. Oh, and Captain Falcon's Utilt is frame 17-20 that does 11% regardless. That's Captain Falcon's slowest tilt by 7 frames - Dtilt is frame 11 - and his 3rd slowest ground move followed by Side and Down Smash (19) and Up Smash (22).
When you look into each move Samus has, some of them like Utilt, Dtilt, Side Smash, Uair, Fair, Bair, and Dair are really good moves, but how does everything connect and interact with each other? They don't really do well like jab, Up Smash, Down Smash, Nair, Zair, Missiles, and her throws. I mean, between Utilt and Up Smash, which would you use for anti-airing? I'd say Utilt since it covers above and in front of her while doing a constant 12%. Cool, she can anti-air, but she needs more than just Utilt and angled Ftilt? For example, Falco will anti-air you with angled Ftilt, Utilt, Up Smash, and even jab and Side Smash if you let him since his jab arcs and Side Smash is transcendent. The commitment Falco makes with his anti-airs aren't heavy and he can do them on reaction outside of Side Smash because none of them are slower than frame 9. Samus has to pick between a frame 8 Ftilt, frame 15 Utilt, frame 10 Side Smash, and frame 11 Up Smash. Of those options, Utilt's the best because of how large its hitbox is, but it's the slowest. Also, with a freaking Power Suit, you'd expect her Side Smash to be transcendent or at least partially invincible, but nope, the bird with weird-*** fingers has a transcendent Side Smash.