We have now a better idea about what we can expect from preseason, even if these details can still be modified.
Here are the main changes that appear on PBE/
Turrets:
In the early game, turret is strong enough not to fall after the first gank because outer turrets get more HP (from 3800 to 5000) and the first one only gives 150 gold instead of 300
Creeps:
They will deal less damage and will get more HP
Runes
Players will have more choices in the runes path
Others:
Drakes: respawn timing from 5 to 6
Elder drake: respawn timing from 6 to 8
Nashor: respawn from 6 to 7
Comebacks are easier to do
Games that are already decided in the early game are easier to finish because the winning team won’t need to wait for Nashor