I don't think Ahri should have been an assassin-type champion in the first place
Honestly, I really like the change they made to Ahri. I read a couple concepts they had for Ahri where they had her R run off an "ammo system" like Akali's. If she were built like that, then I do agree that the removal of her %amp on E was a mistake... But that Ahri concept never ever made it into PBE testing, only internal tests. Her R having only 3 charges per cast puts her in the category of a mage with high mobility. Thematically speaking, the Q QoL change makes complete sense.
They gave her W a target system upgrade and more damage, her E does slightly more damage as well. Those "buffs" were intended to somewhat compensate for the %amp removal, and again I agree with that idea. Do I think it was enough? Well no, I don't. Frankly, the %amp was used in combo with her Q, so I feel like the damage buff was placed on the wrong ability. I think her Q should have received a little more damage (keeping in mind that it does do true damage on return).
Assassin Ahri never should have existed. Her mobility is on the wrong ability to be an assassin, her ultimate. Assassins have their mobility on basic abilities. Since her release I always viewed her as a mage. I like how that was encouraged through this kit adjustment.