Yes, we still have a forum.
Famitsu: How did you decide on the two’s unique actions?Iizuka: Mighty the Armadillo has a setting of being a strong guy, and he has a hard shell on his back. By making use of that, we made it into a technique to drop vertically to the ground and make it shake.Also, he can repel enemy bullets with the shell, and when he’s curled up he can prevent damage once. Doing a sudden drop to the ground is a rare action in the classic series indeed.Famitsu: What about Ray?Iizuka: Since he’s a flying squirrel, we instantly decided on a gliding action. Although it may be similar to Knuckles’ gliding, Ray can raise up with effort. Depending on the [player’s] technique, he can fly for very long.
I'm not gonna lie I kinda wish they added Amy in as a playable character as well, she's not as useless as we think lol.
I bet they saved her & the chaotix gang for Sonic Mania 2.