If you're talking about combat mechanics then unfortunately I don't plan on adding alternate playable characters. However, you can raise your stats as you want, they greatly affect combat. You can be strong but slow, fast but weak, or balanced depending on how you distribute your stats. In the future I will try to add more skills, it will determine your combat style.
As for team members, I cannot promise for sure. It can take a long time to get it into the game, depending on the complexity of the code.
Anyway, thank you, hope you have a great day.