I think there's a difference between "if Valve don't remove the RNG it's playable" and "It'd be improved by removing or toning down the RNG". I've always felt Artifact is at its best when a strategy comes together, and it's almost as good a feeling when a loss comes and you can say "Ah, yeah, I should've done/not done this". But the game is at its worst when you shrug and say "Well, there's nothing I could've done to prevent that, because the shop RNG screwed me, the Card placement RNG screwed me, and the Arrow direction RNG screwed me". And if Valve only improve/remove the shop RNG, then, yeah, I'll be happy, because it'll feel like I have some semblance of control, even when the other RNGs screw me. I just wonder what it would be like without any RNG.
Though, obviously, the best answer to all this would be for Valve to include custom modes, with a configurable card placement and arrow RNG.