Club championship of the CIS countries.

It's like how they held football trials in South America and hockey trials in Europe... Don't you see any similarities?

There are zero similarities. There aren't any athletes in the modern world who play both hockey and football at a high level. I would compare it to tennis on different surfaces. There are tennis players who are favorites on clay but become easy targets on grass (many Spaniards and Argentinians). And there are very strong players who are strong everywhere (Nadal, Federer, Djokovic).
The same applies to Heroes (an analogy to tennis). Some are very specialized – SoD smurfs (for example, Van), but within their specialization, they are strong players. And some are versatile and play all versions very well (Alex, Stinger, Cobra, Le Bron). The former have two paths: continue in their specialization or become versatile and expand their capabilities.
Rafael Nadal was already the king of clay a few years ago (zero losses at Roland Garros for 3 years), but on grass, he was mediocre. Many told him that it wasn't his thing – don't bother.
But he mastered the grass courts of Wimbledon, first reaching the final and then winning the tournament.

So, for us, changes in rules and versions are just a change of surface. Naturally, for some, it's a major issue (SoD smurfers), but for others, it's not (versatile players like Alex, Stinger, Cobra)