Taking a corner as a cross into the box is a low-percentage change - with a high-percentage risk of a dangerous counter-attack. So yes, very much overrated, and not worth the excitement on the side of the attacking team to 'throw the ball into the mixer'. On the other hand, corners are a clean position of possession, where often there are acres of space around the corner taker. Teams that practice these seriously should be able to get more out of them than a low-percentage cross - and I don't mean by recycling possession back to the centre circle and restarting the attack from there. I mean more like this one from Leicester the other week:
Only one defender is following the attacked for the short corner, meaning that, immediately once it's taken, Leicester are 2 vs 1 just outside the box. This allows Albrighton to run into the box with the ball with a lot space to provide a very dangerous assist over the ground.
This is clearly rehearsed and has huge potential. Of course, teams will start responding when this becomes more common (e.g., by putting a defender near the corner taker like for any free kick); but that then leaves space open somewhere else that can be exploited. I am not sure why more isn't done with this sort of thing; but now throw-in coaches are a thing, surely corners can become more of a science as well.
Going back to corners-as-crosses though, I also found this one interesting:
There's a kind of rugby scrum happening around the spot, which is also clearly rehearsed on the Gladbach side, and they execute much better than Dortmund's defense against it. (Thuram can basically just walk through that bunch of Dortmund players towards a free header.)