Making the bot human-like is what I think should be top priority. So I think about things that could be added.
I see some great suggestions here, like "random delay between games" and "occasional emote every 2-3-4 games"
My suggestion is this:
Switch decks. I like to leave the bot on for some hours to grind our the 100 daily. If all I play is 1 deck, it's a bit weird. Maybe make it possible to select 2-3-4 or whatever decks, and then the bot plays each deck from a random number of games before switching to a random deck of those selected. So it could ned up like 5 games with 1 deck, 4 games with another, back to 3 games with the first deck, then 6 games with a third deck etc.
