I would be lying if I would say that I didn't read the passage about RCs you are refering to ;)
Yeah, for the current modus with an ELO System it might be too much, especially because worse players can comensate their skill and just copy decks. So you basically just need to buy the cards and copy decks. But once there are different modes (like a KO-system), own deck building skills become way more important imo.
And of course there could be other modes which allow way less room for such problems. I have been thinking about one a lot during my train ride today. I will post about it tomorrow, as it would be too long for a comment at this point. I will present the idea on SM-Discord as well then.
Your announcements regarding more skill elements, etc. sound great by the way! :)