Basically they're inherently wrong because they are playing God, yeah. Bolin and Korra can meet a new firebender at the arena, which will push Korra more and more into wanting in on Lin's investigation. That can either result in Lin declining and Tenzin encouraging her to continue her training so she can bend fluently again, or them including her. I see the former happening, much to her dismay.
Redemption for the 'bad' people in Republic City that lost it. If they change, maybe she'd give them back, but it's a face to face thing she'd need to do with everyone.
If Asami is to force two good people to drink a mixture, I think maybe Xana should offer at least a small hint as to what it's meant to accomplish. For all she knows it might take theirs away, even if Xano himself said that Tenzin and Lin are people he'd rather work with than against and he has respect for them both. I think if Xano and Xana are ready to test the youth serum on others, they could ask Asami if she would like to provide it to them personally. The actions that are meant to take place all depend on when things are done. Tenzin would never accept the serum willingly since these people are responsible for his wife passing.
Redemption for the 'bad' people in Republic City that lost it. If they change, maybe she'd give them back, but it's a face to face thing she'd need to do with everyone.
If Asami is to force two good people to drink a mixture, I think maybe Xana should offer at least a small hint as to what it's meant to accomplish. For all she knows it might take theirs away, even if Xano himself said that Tenzin and Lin are people he'd rather work with than against and he has respect for them both. I think if Xano and Xana are ready to test the youth serum on others, they could ask Asami if she would like to provide it to them personally. The actions that are meant to take place all depend on when things are done. Tenzin would never accept the serum willingly since these people are responsible for his wife passing.