vova, you're talking about unification... but do you know what people play all over the world? you need to think broader :)
From the standpoint of attracting foreigners, a much more effective approach is demonstrating a higher level of skill than theirs. Then the most advanced fellows from their community start taking interest - who are these bigwigs, how can we play with them.
After a convincing winning streak of away matches, foreigners now regularly sign up for Bai's tournaments, both on TE and SoD.
But on HeroesWorld, with its cross-portal results, few foreigners are interested in visiting. And nobody cares which version is played here. You understand ?
And for skill to grow, you need to get out of the tank, pour out the beer, put your mind and body in order. And train, both solo and in games with the strongest available opponents.
As it happens, our strongest players rarely lock themselves into one version and one template. They usually play everything across the board. Moreover, preferences revolve far from sod-sm.
What is cause and what is effect here is a separate question; here I'm merely stating a fact.