Well, they could make Gabriel's mental illness cyclic. Every three months, the meds aren't enough. Or their effect is erratic. Season two dropped the implications of the snowglobe scene. It's just hard to get back to that guy.
Gabriel isn't self-absorbed enough to have Peter's power. I've noticed that a lot of characters' powers are ironic contrasts to essential aspects of their characters. Peter, as I said, is incredibly self-absorbed. So, when he meets someone with a power, it becomes all about him! Consciously of course, he wants to be good, but he has very little sense of other people, which is the ironic contrast with his empathy power.
Claire is physically invulnerable, but (in the first season version) at least, physical invulnerability is completely useless to the emotional vulnerability entailed by having a sort of Nazi killer for a father, even if he loves you.
Nathan, the good son locked into a career path of world conquest by Mommy and Daddy, has the power of flight, useless to him. He was wound up and set on the rails to the top from the beginning. Of course, he's not really a major character.
Gabriel had the power to understand how things work, but he couldn't understand himself. (I toyed with him accidentally curing himself when he was injured at the end of season one.)
Nikki had superstrength but weak character.
Hiro had to grown up power to change the world (aka spacetime continuum) but was a child. And still is, sadly. They can't let him grow up, because 1.) they don't like grown up and 2.) he is the wrong color to be the Big Hero, I fear.
Matt, also not really a major character, has the power to read minds, but he's not too smart. Yes, odd as it seems, being not too bright is part of Matt's characterization, not Peter's. The writers gave Angela a shout out so they know they've missed a beat. But so it goes.
Gabriel isn't self-absorbed enough to have Peter's power. I've noticed that a lot of characters' powers are ironic contrasts to essential aspects of their characters. Peter, as I said, is incredibly self-absorbed. So, when he meets someone with a power, it becomes all about him! Consciously of course, he wants to be good, but he has very little sense of other people, which is the ironic contrast with his empathy power.
Claire is physically invulnerable, but (in the first season version) at least, physical invulnerability is completely useless to the emotional vulnerability entailed by having a sort of Nazi killer for a father, even if he loves you.
Nathan, the good son locked into a career path of world conquest by Mommy and Daddy, has the power of flight, useless to him. He was wound up and set on the rails to the top from the beginning. Of course, he's not really a major character.
Gabriel had the power to understand how things work, but he couldn't understand himself. (I toyed with him accidentally curing himself when he was injured at the end of season one.)
Nikki had superstrength but weak character.
Hiro had to grown up power to change the world (aka spacetime continuum) but was a child. And still is, sadly. They can't let him grow up, because 1.) they don't like grown up and 2.) he is the wrong color to be the Big Hero, I fear.
Matt, also not really a major character, has the power to read minds, but he's not too smart. Yes, odd as it seems, being not too bright is part of Matt's characterization, not Peter's. The writers gave Angela a shout out so they know they've missed a beat. But so it goes.