Originally Posted by Noperative
Most of the characters I get flash on use it for positioning and distance closing, with flash removed I'll be ganking a lot less. Only on Sona, Janna and Zilean have I ever used flash solely for defensive purposes.
As said before, cleanse + ghost + flash boots is going to make an INCREDIBLY passive early-midgame and it might turn into what DotA was like where people would just farm for 40+ minutes.
The same way you can use Flash to close the distance, the target can use Flash to dodge any projectiles or to get out of range.