I'm for IRMG+plus templates (spiral, M3, etc.).
A standard GСК will easily generate sand for humans and snow for mages. IRMG doesn't have this drawback (it does have some, but they are minor compared to the native generator).
If you choose a race in advance... But don't we all want randomness?
As for the templates, you can use the built-in ones. But only if they have a scheme and description. I won't say that I'm an expert in Mozov's templates, quite the opposite. But there is some logic in them. And Moz has descriptions for them.
So, I'm for playing on the original. But on the original, with the balance as it was intended at the beginning (i.e., without TE). And IRMG will allow us to generate a map that is equally rich for everyone (using normal templates).
Of course, if the majority votes otherwise, I will play according to the rules that are adopted. But I won't be surprised if in every report we read messages like "damn, I lost because I wandered around like a fly - snow, and I'm a mage" and so on.