I will briefly cover some of the vision changes coming in pre-season/season 4.
Riot has added a limit for wards which is 3 stealth wards (previously sight wards) and 1 vision ward per player. This means that teamwork will be superior to selfish play. This also means that the whole team can't rely on the support and have to increase the map awarness themselves.
They have done nothing (so far) to the stealth wards, but they have changed the vision wards. Vision wards are now permanent, but always visible to the enemy, meaning that strategic placement of them will increase their efficiency. This will also mean that you can't have 100% secured bushes from now on.
Riot remade most of the bushes. Most round shapes are now gone and the bushes are mostly line shaped. Riot made this because it makes warding the bush easier, since you couldn't have great vision in a round bush (e.g. blue buffs' bushes).
Riot probably made this because t…