I've had the AI, as a rule, prefer to play non-evasive creatures (all sorts of them) over Mystic Familiar. Not only that, but it was also very regular about chosing to chump-block with it over most other creatures. It is the only creature with guaranteed flying in its deck and the second-best stats after threshold. When you consider that it doesn't attack with non-evasive creatures unless it has some pump in hand, this is very counter-productive.

It needs to value playing evasive stuff (flying, landwalk, protection from color, ublockable, shadow) things more, and suicide-block with those only as last resort.

This also happens with the AI being more inclined to suicide/trade-block with Mystic Visionary (potential evasion) than Venerable Monk (pure fodder) or even Dedicated Martyr (who's very name basically IS "Pure Fodder"). This is causing it to lose won games over and over, as it hangs on to creatures it can't attack with, and throw away creatures the opponent couldn't deal with - whenever the evasive creatures get to attack once and be tapped (and so unable to block) the deck often wins easily.