This is an idea for a new playstyle for LoL I just thought of.
Deathmatch, points are earned for killing enemy champions and ónly for killing them.
Champions with a killstreak give more points on kill, an ace give immense bonus points.
Monsters, Minions and champions don't give gold on kill.
Instead everyone has a fixed Gold per second, maybe Baron and Dragon-like monsters give gold.
Higher max. lvl: 1-25.
As for the map, a Desert themed map would be cool, cacti as brush etc.
Mid lane should have a big circular open pit in the middle making it a very dangerous place, and very good for teamfights.
I'll update this post when I have more ideas for this map/playstyle.
If you have any ideas post them below!