Why is it that the villians have no compunction killing Superboy/Superman? True, he's trying to stop him, but they should know Superboy/Superman is really important to their history, given how he's saved the universe a number of times in the 20th/21st century/ Especially Legion villains born on Earth, who's premature killing of Superman would have a far more damaging ripple effect.
Maybe they think it's a different guy?
If Brainiac 5 is so smart, can't he make Wildfire a containment suit that looks and feels more like an ordinary human? It would sure make things a lot easier with Dawnstar.