Mainly gonna say this:

Just because AST has a few Time Mage esque elements remaining like Gravity (Time Dilation and Arrow "Haste" being removed) and parts of the Lore of Sharlayan Astrology indicating time-related elements, does NOT mean that Time Mage is not an option anymore.

For all we know they might rip out Gravity and replace it with another name + animation (Art of War after removal of Miasma II says hello) just to give it to another job (like blood bath going from WAR to melees).

TL;DR - Time Mage is still possible, stop saying "AST is basically Time Mage"