Hey Rich and thanks for reaching out!
We have indeed been in touch with the fine folks over at Theme Fusion. We have a copy of their latest theme and they have copies of our latest plugins. We’re both in the process of testing any issues that are reported in our forums.
That said, I’ve checked our system for current open tickets related to Avada and see nothing on the radar. That’s a good start!
Was there a specific feature you were wondering would be incompatible with Avada? If so, let me know and I’d be happy to look into it a little more.
Also, free version of The Events Calendar is going to be largely similar to PRO right out of the box–just without recurring events, certain widgets, a couple of extra views and additional fields. You can test compatibility that way just to see if there are any red flags.
Cheers!
Geoff