ARAM Balancing/Mild De-randomizing

Sorry in advance for any jumbled sentences/paragraphs that may come up in the following text.

The Suggestion: Since I've started playing, ARAM has mostly stayed the same in the sense that it's just a fast-paced, random champion, one-lane game mode; however, lately it seems like people just keep getting the same "cancer" champions and making almost every game seem unfair and not fun. My suggestion is to remove some of the randomization with champions and make it to where each player gets a random champion from a certain category (marksman, assassin, fighter, support, tank, and mage). Either ARAM could be upgraded to a 6v6 with the same map or have the lane slightly widened; otherwise, it would remain a 5v5 and the assassin category could be mixed into the fighter and mage groups depending on the champions. I feel like this type of system could be a huge balance to the system because it cuts out comps like 2 supports, 2 tanks, and a strong adc or 3 tanks and 2 marksmen.

Issues with this System: I feel as though players would be required to have champions from each category to play the mode which means it takes longer before the mode is available to them; however, this would also weed out some bot accounts that do nothing but spam level accounts in ARAM. Accounts solely dedicated to ARAM will continue to purchase the best ARAM champions and still get great champs regardless of this system.

Conclusion: I know this was kinda poorly written, but I do hope you take the time to consider it and the benefits it could have. If there were any things written that need some more speculation, I'm glad to provide any explanations. Thank you for your time.