Umul Heather here I hope you are well. Please can you clarify why you feel that re setting your ad placeholders will help your site to have a higher EPMV?
There are many different factors that contribute to your sites EPMV and so whilst I can understand you comparing your site to other peoples sites to see what EPMV they have in order to get an accurate 'reading' you'd also need to compare your Ezoic dashboard set up, the user experience metrics as well as the breakdown of your traffic's country of origin and device data. For example did the Publishers that you speak with have Premium as part of their Ezoic dashboard? Where they using Humix and Flickify?
As an access now Publisher you have access to support through Community, the live stream sessions, Ezoic webinars, Office hours, blogs and support articles.
I have written a blog article here which talks you through a step by step guide on how to increase your EPMV: https://community.ezoic.com/d/3338-how-can-i-increase-my-epmv
For yourself one of the main things that I noticed is that you aren't currently using Flickify or Humix, this could be impacting your revenue by up to 15%.
If you have any questions please do let me know. many thanks