I'm not that familiar with the traumatized!Eliwood idea, actually--I've only really heard mentions of it.

Well, just the idea (which sparked a few 'fics about a year or so ago) that Eliwood's experiences re: girlfriend, father, etc left him deeply messed up and either a basket case if Ninian leaves him again or a pretty wounded individual if she stays as a daily reminder of the killing and such.

Taken in the overall context of Elibe, I don't think that's the case, but it made for some interesting 'fic. I think Lyn's more messed-up than Eliwood, honestly.