Hiya guys,
For anyone else that finds this thread first Googling “premiere alt zoom”, eeeeh222 solved this on the Adobe forums with an AutoHotkey script:
SendMode Input
#NoTrayIcon
#ifWinActive ahk_class Premiere Pro
!WheelUp::Send !{WheelUp}
!WheelDown::Send !{WheelDown}
It still works great in Premiere Pro CC =D