Titanic Auto Reset seems to really affect your AS.
You stop attacking for a good half of a second insetad of immediately going to more AAs.
EDIT: after changing out some items, doesn't need to be that high of attack speed to be noticeable. It is still noticeable with no attackspeed beyond being 18, Jax passive, and Legend: Alacrity. It's still so noticeable that you could miss an AA if you do titanic before W reset.