Probably reduce deaths if the deployed systems are sufficiently capable. This may be offset somewhat by an increase in miles travelled as driving becomes easier.

Why?

Because the current capabilities are insufficient, yet people are using those capabilities as if they are self-driving options. So when Tesla owners get overconfident about their assisted driving mode it ends up adding to the problem.

I even saw a video where a Tesla owner was letting a Youtuber drive and tried to goad him into leaving the car in assisted mode at a dangerous intersection, just to "see what it would do." I think the Youtuber was wise to not do that.