I'm sorry if I sound rude for saying this, but beyond the idea being good the atom dash is a horrible ability in it's current state. there's no recognizable reason to use it over the spamdash due to how long it takes to get even it's first charge, and it's a massive momentum killer compared to the homing attack or the thok. It just makes the only reason to use Alt Sonic the spamdash, but that's already a seperate download.
The Atom Dash either needs to charge MUCH faster, or it needs to not kill your momentum. Because roughly seven seconds are spent charging it, which nullifies it's usefulness for anything but very specific skips. It's not like the spamdash either where it's a joy to briefly pause and readjust, but you've basically just made a worse, airborne spamdash.