There isnt anything to easily add or change. The OP was correct. It literally doesnt work out of the box if winning and attaining rank is your goal. Fireplace was completely incorrect to say that you can get legend with classic and default configs. The ONLY way it will EVER gain rank is if you have "Bonus Stars" to provide it. If you have achieved legend ONCE and still have the bonus stars, then yes this bot WILL achieve Diamond 10 simply because of the bonus stars alone in a few days, and maybe even D5 if you leave it running the entire month and get lucky. But if it starts with NO stars? Erm, it wont do jack shit as far as climbing past gold 10 :) And IMO that's really all it should ever do anyway. You should have to grind it out the first time yourself, and THEN use bots to keep up the grind every month. So I'm satisfied with the way it works out of the box.
It doesnt matter which mode you use, the bot will STILL do stupid shit until you manually configure it not to regardless of which mode you're using it in. It will mulligan away completely valid cards, ignore spells, use spells in a really stupid way, attack all the wrong things, do things completely out of order, hero power at the stupidest times or more correctly NOT hero power when its needed, etc. None of which would ever garner a legend rank in any mode. So unless you've actually got stats, a deck list, AND the config to back it up with other people commenting that it functions the way you say it does, dont bother saying XYZ works in this or that mode because thats all just gloating as if you know anything when you really dont. Just today I witnessed it ignore LETHAL and go after minions instead. I also saw it use power word shield while there were 3 minions on it's side, it power word shielded the ONLY minion that would die and then it proceeded to kill that minion for no reason at all losing stats on the board (something a legend player would never do). The bot's only purpose "out of the box" is exp/gold generation and nothing more, regardless of the mode you're using it in. So it really doesnt matter which mode you're using, which deck you're using, or whether its winning or not. As long as it's slinging cards, it's doing exactly what it should be doing. Gaining exp which in turn gains gold. Once you reach level 400, theres no point in botting anymore. Just turn it off. Dont bother trying to "get legend" or anything like that. It simply isnt going to happen using a bot (this one nor any other bot). I suppose another use for the bot would be to grind through bonus star levels from the previous season, but even that doesnt take all that long to do by hand. Maybe a couple hrs at most, but the bot can do it in a few days usually.
What I find amazing is that people like to claim XYZ deck climbed to legend using bot!.... and then proceed to leave out the fact that it was all done via bonus stars which means it wasnt impressive at all. Every once in a while you'll find someone post configs here in the forums, but none of them are really all that good. Most, if not ALL of them rely upon luck. Meaning they get lucky with 1st turn concedes based on their class (opponent autoconcedes vs X class) and then they get lucky and string a few wins together. That's not skill. Thats just luck.
Anyway I think the MOST important aspect of this particular bot is that it at least makes an ATTEMPT to play the game which makes it a safe bot to use. It isnt in Blizzards best interest to stop it because it provides easy opponents for new players. It's VERY easy to beat a player using this bot. Since I use the bot myself, I know how it works and what it's common mistakes are and its VERY easy to spot them when I'm actually playing myself and I know it'll be an easy win for me because I can predict what it will do in certain situations to my advantage. This is the SOUL reason why botting in this manor has never been bothered by Blizzard. They are more interested in cracking down on the roping bots which provide absolutely nothing of value to new players playing experience. I'm sure the authors of this bot like to use gaining rank as a "selling point" to new users, but lets be real here. That's not exactly what its going to provide ;)