Still doesn't make it a control deck. Does it have removal spells? Does it have good lategame? If the answer is no to either of these question, it's most likely not a control deck. Miracle also removes all the board as much as possible, doesn't make it a control deck. Zoo is awful in lategame at equal states, you need to get an advantage early and win by turn 7-8 or have the opponent under 10 otherwise you're most likely going to lose especially if you're playing an actual control deck that starts pumping out giants with argus, ancients of war, tyrion, sunwalkers and all that shit. This is what a control deck does, delay the game until they reach turn 6+ then win. Zoo is about overwhelming your opponent early and winning asap. It's aggro. At the very most, it's tempo, which is about in the middle of control and aggro.
Even then, the fact it relies on delayed threats to remove stuff still puts it closer to aggro. It doesn't have many charges, it doesn't have many control spells, it simply builds a large amount of shit on the board and can trade more efficiently due to drawing 2cards.