Theres literally no reason not too. None. Zero. A 5 ping wheel is still easily manageable and wouldnt take long to be used to and i can finally stop G pinging bushes repeatedly to my teammates confusion to which i must find a safe place to sit and say "Ward bush/location" and then back to the game.
Honestly if it were up to me the H key, right next to G and not doing much, would be a Ward Ping Wheel. With 4 options "Im warding here"/"Please ward here"/Is there a ward here?"/"Theres an enemy Ward"
Vision is a make or break mechanic in this game and those who utilize it to the fullest win more often. We can ping literally almost anything else, even our Ping(ms), but not ward placements/information???