It’s been tested. I was very surprised too.
Test subject: @thejabrixone’s iskandra TSS sorc
Initially, jabby had close to 4k OA on his original devotion set up, and was managing ~6min clears.
I thought that OA was overkill, so I suggested a change in devotion pathing with less OA, but more offensive procs.
OA dropped to 3.4k, clear time increased by about 10-15s on average.
EDIT: This is also despite the fact that my devotion pathing net him ~150% more elemental damage too.