Regarding Sorcerers and Limited Wish, I can see where Lorehead is coming from- the party Sorceress in my Epic game has used LW several times in the game, and it was one of the first 7th-level spells the character took, this despite the player being a powergamer who hates to spend XP. The feat might be better if, like Wish, you don't eliminate the cost completely- reduced to, say, 50 XP, it may be better.