As ethanol use has exploded in the US, ozone levels have crashed.

If ethanol increased ozone, our ozone should have increased, not decreased.

This chart shows that ozone has decreased 32% from 1980 through 2015.  Note that from 2000 through 2015 when ethanol growth was greatest, ozone decreased over half of that 32% total with a 17% decline.

https://www.epa.gov/air-trends/ozone-trends#oznat

RVP is measured at 100 degrees F and it not representative of what vapor is normally at.  At temperatures below 70 degrees ethanol blends are better than gasoline.  

At ethanol blends around >20 to 30 % even at 100 degrees the RSP is lower than gasoline.  

The RSP of E85 is very low.  

Any possible effects of higher RFP is more than offset with ethanol's other pollution reductions.