Please do not touch Malzahar, Riot.
For years, Malzahar has been a strong champion, yet amongst the most balanced mages. He has very defined strenghts and weaknesses and his kit has the right amount of counterplay. Any kind of change could murder his identity since he is a very strong, but niche champion.
I know the mage rework is incoming, but along with Vel'Koz, please, do not try to ''fix'' what is not broken. If you want to implement new ideas into the game, do so in new champions or champions with actually problematic kits.
As a champion, Malzahar's strenghts are unique. If you want to make changes to Malzahar, research and respect his play patterns, and do NOT assume things.
Malzahar has been one of the most untouched, background champions in years, keeping his identity, strengh and niche.