I've noticed the AI will attack with 0 powered creatures when it can detect no possible way for it to "go wrong", even if there's nothing to be gained from it. A smilar thing happens with low-power/high-toughness creatures.

This is currently causing problems with Disowned Ancestor (at least). The AI will routnely attack with 0 powered Ancestors instead of using their outlast ability (which would make them do actual damage eventually). This also taps them down and also gives the player ways to dipatch them with combat tricks.

--- Sample decklist

.14201 4 Witch's Familiar
.7158 4 Ashen-Skin Zubera
.14256 4 Disowned Ancestor
.7215 4 Gibbering Kami
.7367 4 Scuttling Death
.7266 4 Kami of Lunacy
.9270 4 Springleaf Drum
.4922 4 Addle
.5465 4 Afflict
.15839 4 Grotesque Mutation
.239 20 Swamp

Since the decklist is there | Open

I've also seen the AI keep 2 mana open for nothing and not cast Addle , and I've also seen it be too trigger happy with Grotesque Mutation (casting it on unblocked things)

Also, I've seen it not sacrifice Scuttling Death when doing that in combination with Afflict would kill something. It did cast the afflict on a 4/2 flyer, and didn't sacrifice the spirit to kill it. There might be something wrong with creatures which have both soulshift and an activated ability in general.