My Non-professional opinion on Coast

So as we all know, coast tends to tear up the challenger series and then get their asses handed to them in the LCS. In my humble opinion, this is due to the fact that Coast has 5 very talented INDIVIDUAL players (as Zirene said), but their team play and communication is lacking. So when they play CS teams, whose players tend to be, in general, slightly less talented/experienced than LCS pros, they are able to amass such a large lead in lane that they can then crush fights purely off of being fed from lane. But when they get into the LCS, playing against players who are just as good if not better than them, their lack of shotcalling and communication shines through loud and clear. I am not a coast fan, and am in fact currently rooting for RNG in the finals (which I have on in the background), I think this is the real issue with their team. Tell me what you think.