#1 - When the bot plays stage 1 Astalor, it targets your own hero for 2 damage rather than an opponents minion or hero. (I've only been playing it on death knight though, don't know if it still replicates the same on other classes)

#2 - The bot holds onto Vampiric Blood even with 2 mana + 3 corpses left to play it at the end of the turn.

The only time it will play Vampiric Blood is when your hero's health is around under 15 HP which is very bad for Sire Denathrius right now as it just straight up lethals you, and considering the card increases the total health of your hero means there's no reason to not play it as soon as it has available resources.