Entreri, go back and read the first meeting with Moridin. It clearly states it was the heartbeat and Rand thinks on the tricks himself.Actually Sutt it wasn't. I think that was Moridins thought but that doesn't make it fact. Rand didn't confirm it. I think it was more to show that Moridin truly didn't understand what he was dealing with.Rand did later think on it. There were hints before in ToM and it was confirmed in AMoL. See Terez's post above as well.Nope.
Rand however needs to get close the DF's and see their reaction to his Light. So DF's can still hide amongst his followers, unless he checks them them all, like he did Weirmon and that woman.
Someone can ask Brandon this.
It would be a good question.
Bottom line though there have been hints(fans were clearly stating he didn't actually have the ability after ToM and it was a ruse), there is the Moridin claim, Rand thinks on it and Moiraine calls him out on another trick that he sheepishly admits.
You are drawing conclusions that aren't specifically stated. Rand does say that he has "other tricks" but it is never stated what they are. It's a good debate with evidence to back up both sides. It is clear that he has new abilities or powers post VoG. Whether that is due to his LTT knowledge or his " LIght abilities" is of course a great debate. On a similar note Suttree I've always enjoyed your insights and am interested in your thoughts about how he lit his pipe at the end?