A quick match mode for Summoners Rift

A quick match mode would be perfect for casuals, people who just need a daily, missions, or just people who can only play for a limited time.

It could be a timed mode that ends after 30 mins. The team with the most objectives and team gold win. Other differences could be maybe a slight color change to map. Make it spring colors to differentiate it from standard mode. Since, the Blood Moon mode has autumn colors, and there's already a winter map. The game gold and exp could be double. that way laning phase is shorter and, late game champs could still be useful. Lastly minons, monsters, and items could get a slight adjustment for the shorter game length.

Now another idea to make it even faster everyone could queue up for a role. when champ select starts it could randomly pick a champion in your pool that fits that role. Everyone could reroll or change champs if their comp isn't solid. Then everyone can change skins/runes/masteries as usual. I'm not sure if that would ruin it though.

What are you guys thoughts on this? How would you improve it?