Namely, it will chump-block with things which don't give it benefits when they die before it will chump block with it. It overvalues it's stats.

This sort of issue might crop up again and again with various cards. If there isn't such a thing as a flag for "sacrifice fodder" which would make such a creature a designated preffered blocker, choice for sacrifice targets and willing to aggressively attack into trades, now would be a good time to think about how to put one in. Sacrifice fodder is in decks to be sacrifice fodder, it can't be sacrificing evasive critters in it's place.