@Rito About the Nexus, heart(s) of the map.
CAN WE MAKE SOMETHING OF THE NEXUS like, make it shoot laser beams, dot damage, debuffs, increased turret damage but from the nexus. I feel like turret damage in general really sucks now because doesn't matter tank or not someone can be under your turret for almost a minute without even dying. Could that change? Aside the point, what if the Nexus applied a sort of damage that could be comparable to as 3x of the Baron's damage. Something fearsome. Just an idea I suppose, it's scrambled because I suck with putting ideas into words but I hope you get what I mean.
I guess in a base sentence, BUFF TURRETS AND MEGA BUFF/TRANSFORM NEXUS, do something with terrain that's unique. Stuff like that.