Biggest gripe about Malzahar was the restrictions placed on him.
Mobility-wise
He was an immobile mage before, but even then he had one of the faster movement speed among the mages. Especially considering mages like Anivia, Orianna, Lissandra, Ziggs, etc had movement speeds of 325 versus his 340. Not a fan of reducing his movement to 335 :/
Ranged-wise
The auto attack decrease to 500 from 550 kinda sucked, but it wasn't too bad because that is really only important early game for last hitting minions since your spells weren't enough. However, his W went from being an 800 range instant damage pool to a 450 range slow build up harass that completely depends on Malefic Visions or Nether Grasp to direct them, which leads to my next point.
Spell-wise
His spells pre-rework were independently strong, literally being like semi ults (I appreciated the applications of Null Zone <3 Old Malz). The new Malzahar not only has weaker spells burst-wise, but they have to be combo'd. I used to be able to use every spell whenever the fuck I wanted.
Now Q has to be used to extend E for damage. The Silence is hurt a lot by tenacity now due to being 2 seconds instead of 3. The damage of Q by itself is a joke late game (You used to be able to siege towers and remove 40+% health from enemies that stepped too far forward of their towers with just your Q
Now W forces you to use Voidlings despite them giving like 12 gold each. They can't even tank towers now, which completely defeated the purpose of AD Lane Malzahar (Pushing Towers at the speed of Light)
Now E has to be combo'd with Q, W, or R to have any damage and can't even kill minions on its own. It also has reduced mana regen early game versus his need to use more mana for more spells per wave... RIP Sustain
Now R has lost its squishy killing potential by itself and forces you to have Null Zone with it because people apparently couldn't land an instant cast pool with Nether Grasp according to Riot. I attribute that to natural selection though.
Speaking of Null Zone...
I miss being able to damage minions with it to help E bounce early game while at the same time damage an enemy laner because they happened to wander into the minion mob to last hit.
I miss being able to catch people who tried to run away since Null Zone was an 800 range instant cast spell and Rylai's Scepter was one of Malzahar's staple items.
I miss being able to place the pool wherever the fuck I needed to place it in a team fight while at the same time being able to still cast the other two spells. Now I'm forced to protect my adc with both my pool and suppression
After two Years of trying to master old Malzahar until this random ass rework, I am now a 
main.
#RIPMALZ2016
Disproves of this message. Maybe a buff where 3 minions come at a time would be nice. Methinks.
or 
, as they are dps mages and either ranged enough or tanky enough to survive/stay out of his damage. A while later, I had a one for all game as Azir against Malz. They won, but because the people who picked him(the two top and the one mid) failed miserably against him, while my sister, who had not played Azir before, did decently and I went 30/8/-. My first death was ganking another lane(I forgot that his passive would block the knockback on the ult). It was depressing and infuriating.
