[MathBandit]

My experience (and the experience of others I've seen) is that if you bump difficulty up to +5 (probably minimum +3) then you don't have to police trades because the game does it for you. It's hard to judge some of these trade offers though since most of the stats you listed (OBP, ERA, Wins, RBIs, AVG) don't really say anything meaningful about performance.

Trading AI was MUCH improved last year (maybe the year before; I can't remember) and has seen another significant jump this year. But the default settings are meant for more casual players I think - or players who prefer to have easier trades available and are willing to police themselves.