If Jeigan was passable Endgame, like, say, Marcus? Yes, I would buy that. He is NOT fucking passable. He's getting doubled, owned in one round, doing crappy damage, and you just can't do anything with him. You can run around it all you want, some people might keep him on the team for a few chapters longer than they're supposed to, but NOBODY is bringing him to endgame. Period.
I couldn't give less than half a shit if you call me fucking ignorant, but honestly, must you understand that regardless of shit stats, people use a certain character for whatever reason, such as bringing them into endgame. Please tell me what you're basing this off of, because Normal Mode is obviously too easy for the average FE player, and Jeigan will survive just as well as any other unit.
Source? I'VE FUCKING DONE IT.