VS AI improvements we need
As a coop vs ai player, I find there are several things lacking in that game mode that, in my opinion, should be addressed. The first is a more diverse set of vs ai options: most games against the intermediate ai are pure stomps, and, in some casual discussion with fellow players during and after games, I found the general consensus to be that we would like to see higher difficulty ai opponents.
This leads me to my second point, the need for improved matchmaking in ai games. Often, I find myself matched with up to gold and platinum players who take over a game and starve the other four players of kills, farm, buffs, etc., or new players who lose badly and spam surrender votes. It is a somewhat rare thing to find myself among my peers in terms of gameplay.
Third, given the game is intended to be coop, I very rarely find players who, like myself, pick roles/champs/builds with the team in mind. To resolve this issue, I would like to see team builder extended to coop vs ai games. Another reason for this is because players tend to use ai games to test out new champions before taking them into normal or ranked games. Team builder would be a benefit to this use of coop mode by ensuring that the player can get his/her champ and role consistently, and with a team that will play with the champ/role in question instead of competing with it.
Speaking for myself, there are team comps I want to play around with as well, such as having an assassin/support duo bot, and team builder would help to facilitate this by connecting me with an assassin player who wants to go bot.