WordPress has abstracted its database layer enough that I’m able to host using PostgreSQL on Heroku.
I highly doubt you were able to install and use WordPress on postgresql without any modifications/extensions to WordPress to do so. Why would you expect any WordPress plugin (which is built to work with what WordPress officially supports) to work without modification?
As I’ve learned, lower ratings are merely an indication of not hitting the target audience.
Generally yes, but sir, postgresql users are NOT the target audience of Event Espresso. WordPress users AND specifically the average WordPress user who is NOT jumping through hoops to get WordPress to work with databases it doesn’t officially support. So to those developing Event Espresso, your one star rating doesn’t actually accomplish your intended purpose.
You are certainly entitled to your opinion and your choice of where you voice it, but the point that’s being made in this thread is that your opinion may gain a more receptive audience (and be more helpful) elsewhere.