"Newcomer - 2015. Summer"

Clearly, it's just a tribute to tradition from the time when 90% of games were on the Command key.

Yeah, exactly, it's a tribute, and in my opinion, it's a great template for beginners. You can play hundreds of games on it and improve a lot. It seems you don't understand much about this, which is why you haven't learned to play well.
Regarding them playing HotA in secret, let them play, even if it's in Diablo. What does that have to do with changes in the tournament versions!?