Playing a character with a straight line motivation with no room to veer off course is pretty simplistic
I agree! That’s part of the reason I want to make this change, actually. The side character has a much more complicated relationship with the antagonist, so how they respond to the situation is much more open ended.
To explain why I think it would be a good idea to switch the main character, I should probably give a little description of what this version of the story is about. Disclaimer: Everything I say about this version is liable to change. That’s the reason I haven’t discussed it much up until now.
In this version, you don’t steal powers, you copy them. This means that unlike in version 1, nobody is harmed by your ability unless you use it against them.
When your sweet childhood friend (who would never hurt a fly) suddenly starts stealing powers and causing mass havoc, you need to figure out what turned him evil—Is he blackmailed? Is he mind controlled? Did he finally just snap?—and stop him if it comes to it.
Here’s the problem, though. The MC kept the backstory from before, where you had no powers and were always bullied for it, so you’d probably empathize with your friend for stealing powers rather than think something went terribly wrong and turned your friend evil. Due to that, the whole big plot point of “What turned your sweet childhood friend evil?!” doesn’t seem very convincing.
On the other hand, one side character I made was also friends with the “villain” of the story before he turned evil. The two of them worked together to invent the power stealing device (to use against villains) and then suddenly the sweet friend stole the device, along with the side character’s powers. So this side character definitely has a reason to think their friend turned evil. It raises the stakes a ton.
coupled with becoming less stronk as you go… the rest of the systems in the game are going to have to do a lot of heavy lifting IMO.
This is the part I’m most concerned with. When playing a character, most people would want to get stronger, not weaker! To counter that, I’m thinking that this character starts off as someone who relied on their powers for everything, so they are very out of shape and never tried hard on anything because they never needed to before. When they start losing their powers, they need to actually work on themselves in order to do anything.
Their powers can control time/speed, so once they realize their powers are fading and they only have a limited time with them, they can bulk up / learn a lot / practice fighting / whatever they choose, with the help of their weakening powers speeding up the process for them. Kind of like one of those training montages in films where the character quickly gets more powerful. I was hoping that might help make up for losing your powers, since you’ll still be getting more powerful in other ways. Self-improvement can be a superpower in its own way!