Let me rephrase and add: is it possible to implement the entire mod or at least a part of it for HoMM 3 ERA?
Unfortunately, only the very first version of the plugin works for ERA.
I won't hide the fact that I would like to have all the RMG fixes and improvements that the plugin adds at the moment. I am also a developer of sorts, so my interest is more technical.Or I'll wait for counter-offers).
I'm not ready to open the code yet.
But much of what has been done can be found in the public domain here.
Added 2 hours 10 minutes ago
Freshmod 6.4:
Fixed a crash on a template/in RAI mode.