Pretty sure that's what every pro team is doing. And actually people are talking about Secr[A]t and Cloud [A]
As much as the current meta is balanced, Icefrog will without a doubt did some nerf on those heroes as he is obsessed in getting every hero picked. I mean in TI3 and TI4 there were tons of Chaos Knight, PL and Naga Siren then Icefrog put the bombshell on that illusion reduced damage against buildings.....
In DAC we see a lot of heroes unpicked. Heroes such as Dark Seer and Death Prophet were not used at all even though they were overused in TI3 and TI4. Instead we now see tons of Axe, SF, Juggernaut, Lion.... It's not that I'm complaining about it as this meta makes games much more fun than in TI4 but knowing Icefrog.... he's definitely going to change something before TI5...