How would the game change if each team had 6 champions?

This is meant to be a fun little discussion about a highly improbable change. I was just thinking about how predictable this game has gotten since I began playing. In an overwhelming majority of games you have one champion top lane (sustain usually), one champion middle lane (AP usually), two champions bottom lane(ADC and Support usually), and one champion in the jungle (Sustain/mobility/fighter usually). I like the way that the map is set up. I feel like three lanes and a jungle is complex enough to allow for multiple strategies, yet easy enough to digest. With that said, the team compositions and assignments feel too stale and repetitive sometimes. So, I was thinking about the implications of adding a sixth champion to each team, and this is what I came up with. (Note: This would likely require an additional ban for each team)

Pros

1. Allows for greater diversity in strategy

• This one is pretty straight-forward. You could set up a duo top lane, a duo mid lane, a three person bottom lane, have a roaming champion, a dedicated counterjungling champion, the possibilities feel endless. This would put pressure on players to either adapt to the strategy of the enemy team, or stick to their original strategy and hope it pays off.

2. Champion synergy

• With additional champions in lanes that are rarely played as duo lanes, we'd likely see combinations that we aren't used to seeing, thus opening opportunities for lesser chosen champions to shine, provided they lane with another champion they synergize well with.

Cons

1. Less gold

• By having an additional champion in the mix, it could mean that the sixth champion is forced into a second support role. Of course, with additional champions, there is additional chances for kills, and thus gold. Which brings me to my next point.

2. Snowballing is scary

• With 6 champions on the map, a champion that's snowballing can be a terror as they have additional exp and gold potential.

That's all that I could come up with on my own. So I'm curious, what do you guys think about a change such as this?