Banning bots in ranked battle might be a problem as mentioned due to the lack of human players. It also depends on the time zones and how many players are on, I am from Australia and it might be a problem for people on the other side of the world to get matched up.
It might be better if we ONLY ban bot in Brawls and Tournaments.
RE: Splinterlands will try to implement anti-bot measures in Modern format.