My Bot drafted a deck and made a 12/1 yesterday. I think it was just a lucky draft but for me it works.
as mage two times 5 wins, with paladin and druid 3 wins only. ( played 4 arenas only so far with bot )
5 with paladin. 1st run. trying again now. again 5 wins with paladin. trying mage now. 2/1 - rng but it seems paladin is easiest for the bot to use.
I Draft arena decks using Hearth Arena - Beyond the Tier List my stats for botting with those manuual drafted decks are Hunter 3-3 Mage 5-3, 1-3, 3-3 Paladin 4-3, 2-3, 5-3, 3-2 Priest 6-3, 4-3 Druid 2-3
I let Bot draft, I get on avg 3-5 wins per arena match. But with Hunter/Mage/Priest I have noticed the Bot drafts with Better Logic. (or Guesses? not sure what Bot Uses to draft arena cards one over another) For these classes, giving me an avg of about 5-7 wins with Bot Drafting. Thing to remember is its all RNG: RNG Hero at start RNG cards during Draft RNG on if you get 1 or more Legendary cards during draft RNG on who you fight against RNG on what cards you get during Mulligan. So I personally think the bot does Average as of right now. not too good not too bad. Sometimes you get Lucky, sometimes you get an 0/3 run.