What was the purpose of giving Artificer’s something that’s going to be exactly extra attack 99.9% of the time?

Is Artificer the final version?

Artificer Artillerist: is the turret intended to get a modifier to hit based on your modifier?

THE ARTIFICER REVISITED is NOW!

INVENTORS!
The artificer, a master of magical invention is returned with Arcane Science, Alchemist, Artillerist and Infusions… and a new spell.

DOWNLOAD:
https://media.wizards.com/2018/dnd/downloads/UA-Artificer-2019.pdf