Understanding the differences of players.

I am a very casual league player, I want that too be clear now. My friends, my girlfriend and even my father all fell in love with the team builder system. We are ALL very casual and like to play a role and try to improve on a game to game basis for fun. Now we've all been doing dynamic que and trying too figure the roles out, but unless you have 5 players who all play different roles you have no chance in hell figuring out roles to everyone's liking. Although with team builder we had a chance to pick our roles and champs, we had the power to figure our team comps out and try new things as we wanted too. Im just asking for a definitive answer to why they took team builder away. I feel spoiled now, but I REALLY miss team builder. It made the game almost perfect for me.